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  A.1     Ophthalmology        
  A.2      Pediatric ophthalmology        
  B.2      Histology in ophthalmology        
  B.3     Anatomy in ophthalmology        
  C.1     Ocular pathology        
  C.2     Cancer in ophthalmology        
  D.1     Physiology in ophthalmology        
  D.2     biochemistry in ophthalmology        
  D.3     microbiology in ophthalmology        
  D.4     immunology in ophthalmology        
  D.5     genetics in ophthalmology        
  E.1     symptomatology: general works        
 ↑ E.10           fluorescein angiography             
 ↑ E.11          radiology in ophthalmology             
 ↑ E.12          thermography in ophthalmology             
  E.2     ophthalmology : anterior segment        
  E.3     gonioscopy        
  E.4     ophthalmology : posterior segment        
  E.5     tonometry and tonography        
  E.6     visual field        
  E.7     chromatic sense        
  E.8     electrophysiology in ophthalmology        
  E.9     ultrasound in ophthalmology        
  Fconjunctiva        
  Gcornea        
  Hglaucoma        
  Icataract        
  Juveitis        
  K.1     atlases of the ocular fund        
  K.2     retina        
  K.3     retinal periphery        
  K.4     retinal detachment        
  K.5     vitreous humor        
  Loptical papilla        
  Meyelids        
  Neye socket        
  Olacrimal system        
 ↑ Otorino610                                        Medicine         ≈ 610    
 ↑ Otorino611                                        human anatomy         ≈ 611    
 ↑ Otorino612                                        human physiology         ≈ 612    
 ↑ Otorino617                                        surgery, prosthesis         ≈ 617    
  P.1     strabismus,        
  Qneurophthalmology        
  Reye and extra-ocular pathology        
  Socular traumatology        
  Tergophthalmology and sporting ephtamology        
  U.1     surgery in ophthalmology : general works        
 ↑ U.10          surgical complications in ophthalmology             
 ↑ U.11          anesthesiology in ophthalmology             
  U.2     cataract surgery        
  U.3     glaucoma surgery        
  U.4     keratoplastic and corneal surgery        
  U.5     vitreoretinal surgery        
  U.6     cryocoagulation in ophthalmology        
  U.7     plastic surgery in ophthalmology, eyelid surgery        
  U.8     strabismus surgery        
  U.9     eye socket surgery        
  V.1     pharmacology in ophthalmology        
  V.2     toxicology in ophthalmology        

 
See also:

        
 ↑ AA.     Studies on Africa and other areas    ≈ 960 
 ↑ CSPE     African and Asian area studies    ≈ 950  960 
 ↑ D.PEN     Penal law / Criminal law    ≈ 345 
 ↑ D.PRI     Private law    ≈ 346 
 ↑ D.PRI.A     Companies, enterprises, shareholders    ≈ 346.06 
 ↑ D.PRI.B     Commercial law    ≈ 346.07 
 ↑ D.PRI.C     Private and civil law, civil procedure    ≈ 346 
 ↑ D.PRI.E     Bankruptcy law    ≈ 346.078 
 ↑ D.PRI.F     Industrial law (patents and licenses)    ≈ 346 
 ↑ D.PRI.G     Labour law    ≈ 344 
 ↑ D.PUB     Public law    ≈ 342 
 ↑ D.PUB.A     Regional law    ≈ 342 
 ↑ D.PUB.B     Parliamentary law    ≈ 342 
 ↑ D.PUB.C     Public economic law, accounting    ≈ 342 
 ↑ D.PUB.D     Philosophy of law, political sciences, sociology    ≈ 340.1   342 
 ↑ D.PUB.E     Science of finance, tax law     ≈ 343.04 
 ↑ D.PUB.F     Administrative law    ≈ 342 
 ↑ D.PUB.G     International law    ≈ 342 
 ↑ D.PUB.H     European Union law     ≈ 342  341.2422 
 ↑ D.PUB.L     Public comparative law    ≈ 342  340.2 
 ↑ D.PUB.M     Environmental law    ≈ 344.046 
 ↑ D.PUB.N     Health law    ≈ 342  344.04 
 ↑ DD.     Diplomatic documents    ≈ 327.2 
 ↑ DD.CH     Diplomatic documents of Switzerland    ≈ 327.2 
 ↑ DD.FR     Diplomatic documents of France    ≈ 327.2 
 ↑ DD.GB     Diplomatic documents of Great Britain    ≈ 327.2 
 ↑ DD.IT     Diplomatic documents of Italy    ≈ 327.2 
 ↑ DD.IT AFR     Diplomatic documents Italy / Africa    ≈ 327.2 
 ↑ DD.USA     American diplomatic documents    ≈ 327.2 
 ↑ I.B     History of politcal doctrines    ≈ 320.09 
 ↑ I.C     General and contemporary history    ≈ 900  909.8 
 ↑ I.D     Doctrines (Orient)    ≈ 320 
 ↑ I.E     History of political parties and movements     ≈ 324.209 
 ↑ I.F     Slavery    ≈ 326 
 ↑ I.G     Archives    ≈ 320 
 ↑ I.H     Politcal doctrines (Middle Ages)    ≈ 320.01 
 ↑ I.I     History of social institutions    ≈ 306.09 
 ↑ II.A     International politics    ≈ 327 
 ↑ II.B     International politics (conflicts)    ≈ 327.16 
 ↑ II.C     International law    ≈ 341 
 ↑ II.D     International politics (manuals and depositions)    ≈ 327 
 ↑ II.E     Laws of Native Americans    ≈ 970  348 
 ↑ II.F     Diplomatic relations    ≈ 327 
 ↑ II.G     Foreign affairs    ≈ 327.1 
 ↑ III.A     [Europe]    ≈ 940 
 ↑ III.B     Europe    ≈ 940 
 ↑ III.C     International politics    ≈ 327 
 ↑ III.D     Italian politics    ≈ 940 
 ↑ III.E     History of fascism    ≈ 945.0915 
 ↑ III.F     European history    ≈ 940 
 ↑ III.G     Rome (politics)    ≈ 936 
 ↑ III.H     European history    ≈ 940 
 ↑ ISPE     Economic politics    ≈ 330 
 ↑ IV.A     Various   
 ↑ IV.B     Italy (geography)    ≈ 914.5 
 ↑ IV.C     USA    ≈ 917.3 
 ↑ IV.D     Vatican     ≈ 945.634 
 ↑ IX.A     Poltical studies    ≈ 320 
 ↑ IX.B     Political philosophy    ≈ 320.01 
 ↑ IX.C     Political sociology    ≈ 301 
 ↑ IX.D     International politics    ≈ 327 
 ↑ IX.E     Political studies    ≈ 320 
 ↑ IX.F     Political studies (democracy)    ≈ 321.8 
 ↑ IX.G     Political studies (Church)    ≈ 322.1 
 ↑ SP.1     History of political thought and political philosophy    ≈ 320.01 
 ↑ SP.10     International relations    ≈ 327 
 ↑ SP.11     Ideology    ≈ 320.5 
 ↑ SP.12     Political parties and party systems    ≈ 324.2 
 ↑ SP.13     Pressure groups and movements    ≈ 322.43 
 ↑ SP.14     Politcal institutions and regimes    ≈ 321 
 ↑ SP.15     Science of administration and organization     ≈ 350 
 ↑ SP.16     Public politics analysis    ≈ 320 
 ↑ SP.17     Local government    ≈ 321 
 ↑ SP.18     Electoral behavior    ≈ 324.63   324.7 
 ↑ SP.19     Political culture and socialization     ≈ 323 
 ↑ SP.2     Sociology and theory of law    ≈ 340.115 
 ↑ SP.20     Political change and development    ≈ 321.09 
 ↑ SP.21     Description of political systems    ≈ 321 
 ↑ SP.22     Political anthropology    ≈ 301 
 ↑ SP.23     Sociological theory    ≈ 301.01 
 ↑ SP.3     Political and social psychology    ≈ 302 
 ↑ SP.4     Epistemology    ≈ 121 
 ↑ SP.5     General handbooks and anthologies    
 ↑ SP.6     General political theory    ≈ 320.01 
 ↑ SP.7     Political powers and elites     ≈ 324.4 
 ↑ SP.8     Political and social conflicts    ≈ 303.6 
 ↑ SP.9     Political communications and symbols     ≈ 324 
 ↑ STA     Statistics     ≈ 310 
 ↑ STA10     International trade    ≈ 343.087 
 ↑ STA11     Tourism and transport    ≈ 790.18  358.44 
 ↑ STA12A     Cultural statistics    ≈ 310  306 
 ↑ STA12B     Show business and free time    ≈ 353.77  790.1 
 ↑ STA13     Legal statistics    ≈ 310  340 
 ↑ STA14A     Electoral statistics    ≈ 310  324.6 
 ↑ STA14B     Residences and building     ≈ 352.16 
 ↑ STA15     Economic cycles and conjuncture    ≈ 330.904 
 ↑ STA16     Market researches    ≈ 658.83 
 ↑ STA1A     Handbooks of statistics and economy    ≈ 310.723  330.01 
 ↑ STA1B     Conferences' acts and bibliographies    ≈ 310 
 ↑ STA1C     Methodological studies (ONU)    ≈ 341.23 
 ↑ STA2A     International statistics annual reports    ≈ 314 
 ↑ STA2B     Annual reports of Italian provinces and municipalities   
 ↑ STA2D     ISTAT (methods and regulations)    ≈ 310 
 ↑ STA3A     Environmental problems    ≈ 363.7  310 
 ↑ STA3B     Urban demography and economy    ≈ 304.6  330.91732 
 ↑ STA3C     Health statistics     ≈ 310  616 
 ↑ STA3D     Demographic annual reports     ≈ 310  304.6 
 ↑ STA3E     Migratory movements    ≈ 304.8 
 ↑ STA3F     Demography (handbooks and studies)    ≈ 304.6  310 
 ↑ STA3G     Italian census of population   
 ↑ STA3H     Regional statistic news reports    
 ↑ STA4     Statistics and labour economics    ≈ 310  331 
 ↑ STA5     Consumer goods (prices)    ≈ 310  338.52 
 ↑ STA6A     National accounting   
 ↑ STA6C     Pubblic finance   
 ↑ STA7     Economy (banks)   
 ↑ STA9B     Agricultural economics statistics   
 ↑ STA9D     Industry and services   
 ↑ STA9E     Commercial industry (census)    
 ↑ STACONS     Statistic (literature)   
 ↑ V.B     Turkey and Middle East    ≈ 950  957 
 ↑ V.C     East Europe (Balkan area)    ≈ 949.6 
 ↑ V.D     Spain and Portugal    ≈ 946 
 ↑ V.E     International politics    ≈ 327 
 ↑ V.F     Great Britain    ≈ 941 
 ↑ VI.A     Russia    ≈ 947 
 ↑ VI.B     Germany, Austria    ≈ 943 
 ↑ VI.C     France, Switzerland, Belgium, the Netherlands    ≈ 944 
 ↑ VI.D     North America    ≈ 970 
 ↑ VI.E     South America    ≈ 980 
 ↑ VII.D     International politics    ≈ 327 
 ↑ VII.E     Corporative law   
 ↑ VIII.B     European history    ≈ 940 
 ↑ VIII.C     Middle Ages    ≈ 909.07 
 ↑ VIII.D     European political history    ≈ 940 
 ↑ VIII.E     Diplomatic agreements    ≈ 327.2 
 ↑ VIII.F     History    ≈ 900 
 ↑ X.A     Postwar resistance and politics    
 ↑ XII.B     First World War history     ≈ 940.3 
 ↑ XII.C     Political treaties   
 ↑ XII.D     Foreign policy FR    ≈ 327.1 
 ↑ XII.E     Second World War history    ≈ 940.53 
 ↑ XII.F     European political history    ≈ 940 
 ↑ XII.G     European international politics    ≈ 327 
 ↑ XII.H     World War    ≈ 909 
 ↑ XII.I     History, miscellany    ≈ 900 
 ↑ XII.L     Military history in fascist wars     ≈ 940 
 ↑ XIII.A     Economic policy    ≈ 337 
 ↑ XIII.B     Economic policy FR    ≈ 337 
 ↑ XIV.A     Economic historycal studies    ≈ 330.09 
 ↑ XIV.B     Financial economics    ≈ 336 
 ↑ XIV.C     Political economy    ≈ 330 
 ↑ XIV.D     Liberalism and protectionism    ≈ 382  320.51 
 ↑ XIV.E     Industry and finance   
0        
 ↑ 01       → 330 
 ↑ 02       → 330.1 
 ↑ 03       → 330.1 
 ↑ 04       → 330.9 
 ↑ 05       → 330.12 
1        
 ↑ 11       → 338.9 
 ↑ 12       → 338.9 
 ↑ 13       → 338.54 
2        
 ↑ 21       → 330.0151 
 ↑ 22       → 519 
 ↑ 23        
 ↑ 23       → 332  519.8 
 ↑ 231       → 332  519.8 
 ↑ 239       → 332  519.8 
 ↑ 24        
 ↑ 24       → 658.4 
 ↑ 241       → 658.4 
 ↑ 242       → 658.4 
 ↑ 243       → 658.4 
 ↑ 244       → 658.4 
 ↑ 245       → 658.4 
 ↑ 246       → 658.4 
 ↑ 249       → 658.4 
 ↑ 25        
 ↑ 25       → 519.6 
 ↑ 251       → 519.72 
 ↑ 252       → 519.7 
 ↑ 253       → 515.642 
 ↑ 254       → 519.76 
 ↑ 259       → 519.6 
 ↑ 26       → 519.6 
 ↑ 26       → 511 
 ↑ 261       → 511.3 
 ↑ 262       → 512.7 
 ↑ 263       → 512.5 
 ↑ 264       → 515.7 
 ↑ 265       → 515.35 
 ↑ 266       → 515.723 
 ↑ 267       → 515.26 
 ↑ 268       → 518 
 ↑ 269        
 ↑ 27       → 514 
 ↑ 271       → 3 
 ↑ 272       → 003.54 
 ↑ 273       → 519.3 
 ↑ 274       → 511.5 
 ↑ 275       → 4 
 ↑ 276       → 4 
 ↑ 277       → 371.334 
 ↑ 278       → 006.3 
 ↑ 279       → 510 
 ↑ 28        
 ↑ 28       → 330.0151 
 ↑ 281       → 330.0151 
 ↑ 282       → 330.0151 
 ↑ 283       → 330.0151 
 ↑ 284       → 330.0151 
 ↑ 285       → 330.0151 
 ↑ 288       → 330.0151 
 ↑ 289       → 330.0151 
3        
 ↑ 31         ≈ 332.401 
 ↑ 32       → 339.5 
4        
 ↑ 41       → 343.087 
 ↑ 42       → 327 
 ↑ 43       → 382.17 
 ↑ 44       → 338.91 
5        
 ↑ 51       → 025.1 
 ↑ 52       → 025.11 
 ↑ 53       → 658.8 
 ↑ 54       → 657 
6        
 ↑ 61       → 338.6 
 ↑ 62       → 338 
 ↑ 63       → 338 
 ↑ 64       → 338.45 
7        
 ↑ 71       → 630 
 ↑ 72       → 577 
 ↑ 73       → 330.9 
8        
 ↑ 81       → 331.1 
 ↑ 82       → 331.1 
 ↑ 83       → 331.8 
 ↑ 84       → 331 
 ↑ 85       → 331.1 
9        
 ↑ 91       → 331 
 ↑ 92       → 331 
 ↑ 93       → 330.91732 
 ↑ 94       → 330.9 
 ↑ ROI       → 327 
 ↑ ROI.1       → 900 
 ↑ ROI.2       → 320 
 ↑ ROI.3       → 340 
 ↑ ROI.4       → 330 
0     reference, information   
00     information and computer science   
 ↑ 001     knowledge   
 ↑ 001.4     research methods and statistics   
 ↑ 001.5     information, communication, HCI  → 006.7  153  808.02 ora 004.019
 ↑ 003     systems  → 518.6  519.6  ≈ :S.0 
 ↑ 003.5     communication and control theory, cybernetics  → 629.8  ≈ :N.3 
 ↑ 003.7     system types    ≈ 515.39 
 ↑ 003.8     systems according to time   
 ↑ 004     hardware, networks, computer science generally  → 519.4  621.39  ≈ :P.0 
 ↑ 004.16     computer types, microcomputers   
 ↑ 004.22     architecture of computers   
 ↑ 004.3     processing modes   
 ↑ 004.6     networks, Internet   
 ↑ 005     programming and data   
 ↑ 005.1     programming  → 511.3  519.7 
 ↑ 005.117     object-oriented programming   
 ↑ 005.13     programming languages    ≈ :P.1 
 ↑ 005.14     tests, measures, debugging   
 ↑ 005.2     programming for the Net: ASP, JS, JSP, MPI...   
 ↑ 005.3     programs   
 ↑ 005.4     operative systems   
 ↑ 005.7     data, databases   
 ↑ 005.72     formats, HTML, LaTEX  → 510.285 
 ↑ 005.74     databases, big data  → 006.31 
 ↑ 005.8     data security  → 343 
 ↑ 005.82     encryption, cryptography   
 ↑ 006     methods, applications  → 542  610.285 
 ↑ 006.3     artificial intelligence  → 629.8  ≈ AI1  AI2 
 ↑ 006.31     machine learning, data mining  → 005.74  658.403 
 ↑ 006.37     artificial vision  → 152.1 
 ↑ 006.6     digital images  → 550.28  620.0042  621.36 
 ↑ 006.7     multimedia, Web interfaces  → 001.5 
 ↑ 016.2     religious bibliography  → 2 
 ↑ 016.54     bibliography of chemistry  → 540 
 ↑ 016.78     music bibliography  → 780 
 ↑ 016.78026     bibliography on scores and texts  → 780.26 
 ↑ 016.780262     bibliography on musical manuscripts  → 780.262 
 ↑ 016.78092     bibliography on musicians  → 780.92 
 ↑ 016.780945     Italian music bibliography  → 780.945 
 ↑ 016.781     bibliography on music principles and forms  → 781 
 ↑ 016.782     bibliography on vocal music  → 782 
 ↑ 016.7821     bibliography on dramatic music  → 782.1 
 ↑ 016.7822     bibliography on non-dramatic vocal music  → 782.2 
 ↑ 016.8     bibliography on literature  → 800 
02     library and information science   
 ↑ 020     library science in general   
 ↑ 025     library activities and services   
 ↑ 027     libraries and archives  → 727.8 
 ↑ 069     museology  → 727.7 
 ↑ 070     news, press, publishing   
 ↑ 079.6       → 916 
1     philosophy, psychology   
15     psychology, perception   
 ↑ 152     perception, emotions  → 611.8  612.8  629.8 
 ↑ 152.1     sensorial perception, vision  → 006.37 
 ↑ 153     mental processes, understanding  → 001.5  616.89 
 ↑ 153.8     will, choice, decisions  → 658.403 
 ↑ 160     logic  → 510.1  511.3 
17     ethics   
 ↑ 170     ethics generally, bioethics  → 340.112 
 ↑ 172       → 320.01 
 ↑ 172.4     ethics of international relationships, peace  → 327.172 
 ↑ 174     professional ethics   
 ↑ 174.2       → 610 
 ↑ 179     applied ethics   
 ↑ 181.07     Islamic philosophy  → 297 
 ↑ 181.4     Indian philosophy  → 294.5  915.4 
2     religion   
24     Christian practice and observance   
 ↑ 248     Christian practice  → 726.5  781.71 
 ↑ 251.53     Jesuits  → 271.53 
 ↑ 262.9     Church law  → 346.016  346.45016 
 ↑ 270.8     history of Church after 1789  → 909.8 
 ↑ 270.82     history of Church in 20th century  → 909.82 
 ↑ 271.53     history of Jesuits  → 251.53 
 ↑ 274.2     christianism in England  → 942 
 ↑ 276     Christianism in Africa  → 960 
 ↑ 282.09     Roman Church history  → 956.9 
 ↑ 282.5     catholic Church in Asia  → 915 
29     non-Christian religions   
 ↑ 294     Buddhism, Hinduism   
 ↑ 294.5     Hinduism  → 181.4  915.4 
 ↑ 296     Judaism   
 ↑ 296.09     history of Judaism  → 909.0492  933  956.94 
 ↑ 297     Islam  → 181.07  305.697  340.59 
 ↑ 297.09     history of Islam  → 956 
 ↑ 299     other religions   
3     social sciences   
 ↑ 301     sociology in general  → 923 
 ↑ 301.096     sociology and anthropology of Africa  → 916 
 ↑ 304     sociological essays   
 ↑ 304.2     human ecology  → 363.7  577 
 ↑ 304.5     nature and culture, human ethology, sociobiology  → 320  591.5 
 ↑ 304.6     population   
 ↑ 304.8     population movements  → 325 
 ↑ 305     social groups   
 ↑ 305.42     social function and status of women  → 331.4 
 ↑ 305.8     ethnical groups  → 320 
 ↑ 305.800968     apartheid  → 323.168  968 
 ↑ 305.89159     Kurds  → 956 
 ↑ 305.8924     Jews  → 909.0492 
 ↑ 305.8927     Arabs  → 305.697 
 ↑ 305.8928     Ethopians  → 963 
 ↑ 305697     Muslims  → 297  305.8927 
 ↑ 306     culture and institutions   
 ↑ 306.096     African social history  → 960 
 ↑ 307     communities  → 711.4  728 
31     statistics   
 ↑ 310     general statistics  → 519.5 
32     political sciences   
 ↑ 320     anthropology in general  → 304.5  305.8  599.93 
 ↑ 320.01       → 172 
 ↑ 320.531     socialism  → 335 
 ↑ 320.55     religion-grounded theories and ideologies  → 909.09767 
 ↑ 320.9174927     polical conditions in Arab countries  → 320.956 
 ↑ 320.94     political conditions in Europe  → 341.2422 
 ↑ 320.95     political conditions in Asia   
 ↑ 320.956     political conditions in Middle East  → 320.9174927  956 
 ↑ 320.95694     political conditions in Palestine and Israel  → 327.5694  956.94 
 ↑ 320.96     political conditions in Africa  → 960.3 
 ↑ 320.965     political conditions in Algeria  → 349.65 
 ↑ 323.168     minority rights in South Africa  → 305.800968  968 
 ↑ 323.6     citizenship   
 ↑ 324.2     political parties  → 329 
 ↑ 325     migration  → 304.8  331.6 
 ↑ 325.2     emigration   
 ↑ 325.3     colonization   
 ↑ 325.309     colonization history  → 950  960 
 ↑ 325.309034     colonization in 19th Century   
 ↑ 325.32     imperialism   
 ↑ 325.34     European colonization   
 ↑ 325.341     British colonization  → 960 
 ↑ 325.343     German colonization   
 ↑ 325.344     French colonization   
 ↑ 325.344096     French colonization in Africa   
 ↑ 325.345     Italian colonization   
 ↑ 325.345096     Italian colonization in Africa  → 961  963  967.7 
 ↑ 325.346     Spanish and Portuguese colonization   
 ↑ 325.3469     Portuguese colonization   
 ↑ 325.6     colonization of Africa  → 960 
 ↑ 327     international relations  → 172.4  337  341 
 ↑ 327.0904     international relations in 20th Century  → 909.82 
 ↑ 327.12     secret service   
 ↑ 327.17     international cooperation  → 341.7 
 ↑ 327.172     promotion of peace  → 172.4  341.1 
 ↑ 327.4     European international relations  → 341.2422 
 ↑ 327.406     Europe-Africa relations   
 ↑ 327.41     international relations of Britain   
 ↑ 327.45     international relations of Italy   
 ↑ 327.5     Asian international relations   
 ↑ 327.5691     Syrian international relations  → 956.91 
 ↑ 327.5694     international relations of Israel and Palestine  → 320.95694  956.94 
 ↑ 327.73     international relations of USA  → 973 
 ↑ 329     political parties [obsolete]  → 324.2 
33     economics    ≈ S.SPEC.39.DH 
 ↑ 330.0151     mathematical economics  → 519.8  ≈ :R.3 
 ↑ 330.17     theory of property  → 346.04  346.4504 
 ↑ 330.91     economic conditions by region   
 ↑ 330.95     economic conditions in Asia   
 ↑ 330.96     economic conditions in Africa  → 335.0096  338.96 
 ↑ 331.4     working women  → 305.42 
 ↑ 331.6     workers of particular ethnic groups  → 325 
 ↑ 332.1     banks  → 346.08 
 ↑ 333     real estate   
 ↑ 333.3     private property, expertise  → 346.043 
 ↑ 333.33     land sell  → 346.0436 
 ↑ 333.337     selling urban land  → 711.4 
 ↑ 333.7     natural resources, energy  → 338.927  354  621.31  720.47 
 ↑ 333.72     conservation  → 344.046  639.9  719  ≈ S.SPEC.32.BJ  `18C 
 ↑ 333.95     biological resources  → 577 
 ↑ 334     cooperatives   
 ↑ 334.6     producer cooperatives   
 ↑ 335     socialist economy  → 320.531 
 ↑ 335.0096     socialism in Africa  → 330.96 
 ↑ 337     international economical politics  → 327  338.91 
 ↑ 337.4     European foreign policy   
 ↑ 338     production, microeconomics  → 658 
 ↑ 338.02     products and services, study of commodities  → 333.7 
 ↑ 338.1     agricultural economics  → 630 
 ↑ 338.1096     economics of African agriculture  → 330.96  916 
 ↑ 338.2     mining economics  → 622 
 ↑ 338.2728     oil economics  → 622.33  915.6 
 ↑ 338.54     economic fluctuations  → 519.5 
 ↑ 338.6     production organization   
 ↑ 338.9     economical development and growth   
 ↑ 338.91     international development and growth  → 337 
 ↑ 338.92     specific ecomonic policies   
 ↑ 338.927     environmental economy, sustainable development  → 333.7  720.47 
 ↑ 338.96     economical development of Africa  → 330.96 
34     law   
 ↑ 340     law in general   
 ↑ 340.112     law and ethics  → 170 
 ↑ 340.59     Islamic law  → 297  349.65 
 ↑ 340.92     conflict of laws on contracts and representation  → 346.02 
 ↑ 341     international law  → 327 
 ↑ 341.1     pacifism [obsolete]  → 327.172 
 ↑ 341.2422     treatises of European Union  → 320.94  327.4 
 ↑ 341.45     open sea  → 387.5 
 ↑ 341.7     international cooperation law  → 327.17 
 ↑ 342     public, administrative, constitutional law   
 ↑ 342.06     administrative law  → 342.4506 
 ↑ 342.066     administrative procedure  → 342.45066 
 ↑ 342.085     rights and personal activities  → 342.45085 
 ↑ 342.0853     freedom of information and opinion  → 342.450853 
 ↑ 342.0858     privacy protection  → 342.240858  342.450858 
 ↑ 342.0878     women rights  → 342.450878 
 ↑ 343     military, public property, fiscal law  → 005.8 [e Fisica 34]
 ↑ 343.02     public heritage law  → 343.4502 
 ↑ 343.025     real estate  → 343.45025 
 ↑ 343.07     economical law  → 343.4507 
 ↑ 343.071     protection of consumers  → 343.45071 
 ↑ 343.076     agriculture regulation  → 343.45076  630 
 ↑ 343.078     secondary industries and services  → 343.45078 
 ↑ 343.08     trade regulation  → 343.4508 
 ↑ 343.09     public service law  → 343.4509 
 ↑ 343.094     road transport law  → 343.45094  363.125  629.2 
 ↑ 343.094026     traffic laws  → 343.45094026 
 ↑ 344     social law, safety, environment, nature reserves  → 333.72  363  614  690.22  ≈ S.SPEC.32.BJ e al Botta 2
 ↑ 344.01     labour law  → 344.4501 
 ↑ 344.017     professional qualification law  → 344.45017 
 ↑ 344.04     law of social problems and services  → 344.4504  362 
 ↑ 344.041     healthcare staff law  → 344.45041  610.69 
 ↑ 344.0419     medical profession law  → 344.450419 
 ↑ 344.042     laws on food and drugs  → 344.45042  615  664 
 ↑ 344.046     environmental protection  → 333.72  344.45046  363.72 
 ↑ 344.09     culture and religion law  → 344.4509 
 ↑ 345     penal law   
 ↑ 346     private, civil, urbanistic law  → 348  711 
 ↑ 346.0026     texts of acts and verdicts of private law  → 346.450026 
 ↑ 346.01     law of persons and families  → 346.4501 
 ↑ 346.013     legal capacity of persons  → 346.45013 
 ↑ 346.0138     capacity of persons with mental disorders  → 346.450138 
 ↑ 346.015     family law  → 346.45015 
 ↑ 346.016     marriage, domestic partnership, civil union  → 262.9  346.45016 
 ↑ 346.016026     texts of acts on marriage  → 346.45016026 
 ↑ 346.0166     divorce  → 346.450166 
 ↑ 346.02     contracts and representation  → 340.92  346.4502 
 ↑ 346.02026     texts of acts on contracts and representation  → 346.4502026 
 ↑ 346.022     contracts  → 346.45022 
 ↑ 346.03     offenses  → 346.4503 
 ↑ 346.03026     texts of acts on offenses  → 346.4503026 
 ↑ 346.031     employers responsibility  → 346.45031 
 ↑ 346.032     negligence  → 346.45032 
 ↑ 346.0322     accidents  → 346.450322 
 ↑ 346.0323     personal injuries  → 346.450323 
 ↑ 346.04     property  → 330.17  346.4504 
 ↑ 346.043     real estate law  → 333.3  346.45043 
 ↑ 346.0434     real estate tenancy  → 346.450434 
 ↑ 346.0434026     texts of acts on real estate tenancy  → 346.450434026 
 ↑ 346.04348     location of agricultural land  → 346.4504348 
 ↑ 346.04348026     texts of acts on agricultural land location  → 346.4504348026 
 ↑ 346.0435     easement  → 346.450435 
 ↑ 346.0436     real estate sell  → 333.33  346.450436 
 ↑ 346.045     land planning  → 690.2  711.4 
 ↑ 346.048     copyright, patents and trade marks law  → 346.45048  608 
 ↑ 346.05     inheritance  → 346.4505 
 ↑ 346.052     inheritance and succession  → 346.45052 
 ↑ 346.054     testament  → 346.45054 
 ↑ 346.059     trusteeship, fideicommissum  → 346.45059 
 ↑ 346.06     organizations, associations  → 346.4506 
 ↑ 346.064     no-profit organizations  → 346.45064 
 ↑ 346.065     law of enterprises  → 346.45065 
 ↑ 346.066     company law  → 346.45066 
 ↑ 346.068     enterprises without legal personality  → 346.45068 
 ↑ 346.07     commercial law  → 346.4507 
 ↑ 346.072     law of selling  → 346.45072 
 ↑ 346.073     law of loan  → 346.45073 
 ↑ 346.074     warranted operations  → 346.45074 
 ↑ 346.077     law of creditors  → 346.45077 
 ↑ 346.08     bank and insurance law  → 332.1  346.4508  368 
 ↑ 346.09     investment and negotiable instrument law  → 346.4509 
 ↑ 346.092     investment law  → 346.45092 
 ↑ 346.096     negotiable instrument law  → 346.45096 
 ↑ 347.01     tribunals  → 347.4501 
 ↑ 347.016     public officers  → 347.45016 
 ↑ 347.07     cases  → 347.4507 
 ↑ 347.077     judgments  → 347.45077 
 ↑ 347.09     arbitration  → 347.4509 
 ↑ 348     laws, regulations, jurisprudence  → 346 
 ↑ 349     law in specific states   
 ↑ 349.5     law in Asian countries  → 915 
 ↑ 349.52     Japanese law  → 915.2 
 ↑ 349.6     law in African countries  → 916 
 ↑ 349.63     Ethopian law  → 916.3 
 ↑ 349.65     Algerian law  → 320.965  340.59  916.5 
 ↑ 349.67     law in central Africa   
35     public administration and military science   
 ↑ 352.5     heritage administration  → 725.1 
 ↑ 355     military science  → 358.4  359  623 
 ↑ 358.4     air force and operations  → 355  629.1 
 ↑ 359     maritime force and operations  → 355 
36     social problems and services   
 ↑ 361     social services   
 ↑ 362     welfare  → 344.04 
 ↑ 362.1     health services  → 614 
 ↑ 363     security and social problems  → 344 
 ↑ 363.1     public security  → 620.11  628.9 
 ↑ 363.12     transportation risk  → 711.7 
 ↑ 363.125     road transportation risk  → 343.094  629.213 
 ↑ 363.17     dangerous substances   
 ↑ 363.25     criminal investigation  → 614.1 
 ↑ 363.3     civil protection, disasters  → 624.176 
 ↑ 363.7     pollution, environmental concerns  → 304.2  344.046  628.5  632.95 
 ↑ 364     criminology  → 614.17 
 ↑ 368     insurance  → 346.08  519.8 
37     education   
 ↑ 370     education in general, pedagogy, textbooks at Physics Library  → 507  510.7  707  ≈ :T.7 
 ↑ 370.96     learning in Africa  → 916 
 ↑ 378     university  → 727.3  ≈ S.SPEC.38.DE 
 ↑ 378.4529     University of Pavia  → 945.29 
38     communication   
 ↑ 385     rail transport  → 625.1 
 ↑ 386     river transport   
 ↑ 386.4     transport via canals  → 627.13 
 ↑ 386.43     Suez Canal   
 ↑ 387.5     maritime transport  → 341.45 
4     languages    ≈ S.SPEC.38.DF 
 ↑ 420     English in general   
 ↑ 423     English dictionaries  → 503  603  ≈ :C.92 
 ↑ 433     German dictionaries    ≈ :C.93 
 ↑ 443     French dictionaries    ≈ :C.94 
 ↑ 453     Italian dictionaries    ≈ :C.91 
 ↑ 491     Indo-iranic languages, Russian language   
 ↑ 492     Semitic languages, Arabian language   
 ↑ 495     Eastern languages, Chinese   
 ↑ 496     African languages  → 896  916 
5     pure sciences   
50     science   
 ↑ 500     sciences generally   
 ↑ 501     philosophy of science    ≈ :ZE.0  S.SPEC.38.DC 
 ↑ 502     professions and materials   
 ↑ 502.8     techniques, devices, equipment   
 ↑ 502.82     microscopy   
 ↑ 503     scientific dictionaries and encyclopedias  → 423  603 
 ↑ 507     science didactics, textbooks at Botta 2  → 370  510.7  ≈ :T.6 
 ↑ 509     history of science    ≈ :D.1  `31E 
51     mathematics   
 ↑ 510     mathematics generally    ≈ `60E 
 ↑ 510.1     philosophy of mathematics  → 160 
 ↑ 510.21     mathematics tables  → 515.021 
 ↑ 510.285     computers in mathematics  → 005.72  519.4 
 ↑ 510.7     mathematics teaching  → 370  507  793.74  ≈ :T.5 
 ↑ 510.9     history of mathematics    ≈ :D.2 
 ↑ 511     general principles of mathematics    ≈ :E.0 
 ↑ 511.3     mathematical logic, computability  → 005.1  ≈ :E.1 
 ↑ 511.32     sets    ≈ :E.2 
 ↑ 511.35     recursitivy, cellular automata, λ calculus   
 ↑ 511.4     approximations, error  → 518.5  ≈ :I.9 
 ↑ 511.5     graph theory    ≈ :F.1 
 ↑ 511.6     combinatorics    ≈ :F.0 
 ↑ 512     algebra    ≈ :G.0  AL1 
 ↑ 512.2     group theory    ≈ :G.9 
 ↑ 512.3     field theory    ≈ :G.3 
 ↑ 512.4     rings    ≈ :G.6 
 ↑ 512.482     Lie algebras and groups    ≈ :M.3 
 ↑ 512.5     linear algebra    ≈ :G.5 
 ↑ 512.6     category theory, homological algebra, K theory    ≈ :G.8 
 ↑ 512.7     number theory    ≈ :H.0 
 ↑ 512.72     elementar number theory    ≈ :H.1 
 ↑ 512.74     algebraic number theory    ≈ :H.2 
 ↑ 512.75     geometry of numbers    ≈ :H.2 
 ↑ 512.9     foundations of algebra, logarithms   
 ↑ 514     topology    ≈ :L.0  L.1 
 ↑ 514.2     algebraic topology    ≈ :L.2 
 ↑ 514.7     analytical, differential, global topology    ≈ :L.3 
 ↑ 514.74     global analysis, fractals    ≈ :M.1 
 ↑ 515     calculus  → 518.6  ≈ :I.0 
 ↑ 515.021     tables of calculus  → 510.21  ≈ :I.99 
 ↑ 515.07     exercises in analysis    ≈ :I.98 
 ↑ 515.2     general aspects of calculus   
 ↑ 515.24     sequences and series, Fourier analysis    ≈ :I.8  I.10 
 ↑ 515.3     differential calculus    ≈ :I.13 
 ↑ 515.35     differential equations   
 ↑ 515.352     ordinary differential equations, ODEs  → 518.63  ≈ :I.14 
 ↑ 515.353     partial differential equations, PDEs    ≈ :I.15 
 ↑ 515.355     nonlinear differential equations   
 ↑ 515.39     dynamical systems, chaos  → 003.7  ≈ :I.14 
 ↑ 515.4     integral calculus, integral equations   
 ↑ 515.42     measure and integration theory    ≈ :I.3 
 ↑ 515.45     integral equations    ≈ :I.17 
 ↑ 515.5     special functions    ≈ :I.7 
 ↑ 515.6     other analytical methods   
 ↑ 515.62     finite differences    ≈ :I.16 
 ↑ 515.64     calculus of variations    ≈ :I.19  
 ↑ 515.7     functional analysis    ≈ :I.18 
 ↑ 515.72     operator calculus, transforms    ≈ :I.12 
 ↑ 515.75     functional equations    ≈ :I.16 
 ↑ 515.785     abstract harmonic calculus    ≈ :I.11 
 ↑ 515.8     real variable functions    ≈ :I.2 
 ↑ 515.9     complex variable functions   
 ↑ 515.93     functions of one complex variable    ≈ :I.4 
 ↑ 515.94     functions of several complex variables    ≈ :I.6 
 ↑ 515.96     potential theory    ≈ :I.5 
 ↑ 516     geometry    ≈ :J.0 
 ↑ 516.08     convex sets    ≈ :J.2 
 ↑ 516.3     analytical geometries   
 ↑ 516.35     algebraic geometry    ≈ :K.0 
 ↑ 516.353     several-dimension algebraic manifolds    ≈ :K.3  K.4 
 ↑ 516.36     differential and integral geometry  → 531  ≈ :M.2 
 ↑ 516.5     projective geometry    ≈ :J.1 
 ↑ 516.6     abstract descriptive geometry    ≈ :J.1 
 ↑ 518     numerical analysis  → 519.4 
 ↑ 518.4     numerical methods in algebra and in number theory    ≈ :O.3 
 ↑ 518.5     numerical approximation  → 511.4  ≈ :O.2 
 ↑ 518.6     numerical methods in analysis  → 3  515 
 ↑ 518.63     numerical solutions of ordinal differential equations  → 515.352  ≈ :O.4 
 ↑ 518.64     numerical solutions of partial differential equations  → 515.353  ≈ :O.5 
 ↑ 519     probability, statistics, applied maths  → 610.72  ≈ :N.0  S.SPEC.42.GB 
 ↑ 519.2     probability    ≈ :N.1 
 ↑ 519.23     stochastic processes, Markov chains, martingales   
 ↑ 519.3     game theory    ≈ :R.2 
 ↑ 519.4     applied numerical analysis, finite elements, MATLAB  → 4  510.285  518 
 ↑ 519.5     mathematical statistics  → 310  338.54  ≈ :N.2 
 ↑ 519.53     descriptive statistics, multivariate analysis  → 658.403 
 ↑ 519.6     mathematical optimization  → 3  ≈ :O.7  OM1 
 ↑ 519.7     programming theory, operations research  → 005.1  658.4  ≈ R.1 
 ↑ 519.8     mathematical methods of sciences  → 368  ≈ :Q.0 
52     astronomy   
 ↑ 520     astronomy generally   
 ↑ 523.44     asteroids    ≈ `10H 
 ↑ 526     mathematical geography, topography  → 711  912 
 ↑ 526.9     surveying  → 550.28 
53     physics   
 ↑ 530     physics in general  → 612.014  ≈ `60D 
 ↑ 530.021     physics tables   
 ↑ 530.092     physicists   
 ↑ 530.1     theoretical and mathematical physics    ≈ `60C 
 ↑ 530.11     relativity    ≈ :ZA.6 
 ↑ 530.12     quantum physics    ≈ :ZA.8 
 ↑ 530.13     statistical mechanics  → 536.7  ≈ :ZA.10 
 ↑ 530.14     fields and waves  → 621.3813 
 ↑ 530.15     mathematical physics  → 531  ≈ :ZA.0 
 ↑ 530.4     states of matter   
 ↑ 530.41     solid state physics   
 ↑ 530.415     mass diffusion and transfer   
 ↑ 530.42     liquid state physics  → 532 
 ↑ 530.44     plasma and ionized gas physics   
 ↑ 530.8     measurement  → 681.2 
 ↑ 531     classical mechanics, continuum mechanics  → 516.36  530.15  620.1  ≈ :ZA.1 
 ↑ 531.1     mechanics, statics   
 ↑ 531.16     particle mechanics    ≈ :ZA.2 
 ↑ 531.3     solid dynamics  → 624  ≈ :ZA.3 
 ↑ 531.6     energy   
 ↑ 532     fluid mechanics  → 530.42  551.48  ≈ :ZA.4 
 ↑ 533     gas mechanics   
 ↑ 534     sound and vibrations  → 620.2 
 ↑ 535     optics  → 621.36  ≈ :ZA.7 
 ↑ 535.8     optical spectroscopy in infrared and ultraviolet   
 ↑ 536     thermology   
 ↑ 536.5     temperature   
 ↑ 536.56     cryogeny, low temperatures   
 ↑ 536.7     thermodynamics  → 530.13  541.369  621.4  ≈ :ZA.5 
 ↑ 537     electromagnetism  → 621.3  ≈ :ZA.7 
 ↑ 537.535     X and gamma rays electronics  → 539.722 
 ↑ 537.62     conductivity and electric resistance   
 ↑ 538     magnetism   
 ↑ 538.36     magnetic resonance  → 610.28 
 ↑ 538.362     NMR: nuclear magnetic resonance   
 ↑ 538.364     EPR: electronic paramagnetic resonance   
 ↑ 539     modern physics   
 ↑ 539.2     radiations  → 621.382 
 ↑ 539.7     atomic and nuclear physics  → 621.48  ≈ :ZA.9 
 ↑ 539.72     particle physics, ionizing radiations   
 ↑ 539.721     neutrons and other particles   
 ↑ 539.722     ionizing radiations, X, gamma and cosmic rays  → 537.535 
 ↑ 539.75     nuclear interactions, radioactivity   
 ↑ 539.77     particle and radioactivity detection and measure   
54     chemistry   
 ↑ 540     chemistry in general  → 016.54  660.28  ≈ `59A  S.SPEC.36.CB 
 ↑ 540.14     nomenclature   
 ↑ 540.2     miscellaneous works in chemistry   
 ↑ 540.7     education and research in chemistry   
 ↑ 540.76     exercice and auxiliary books in chemistry   
 ↑ 540.9     history of chemistry   
 ↑ 540.92     biographies of chemists   
 ↑ 541     physical chemistry  → 660.29  ≈ `60A 
 ↑ 541.042     matter state chemistry, solid state   
 ↑ 541.2     theoretic chemistry   
 ↑ 541.22     molecular structure    ≈ `60B 
 ↑ 541.220     formulas, specifications   
 ↑ 541.223     stereochemistry   
 ↑ 541.224     chemical bonds, valency, radicals   
 ↑ 541.2242     coordination compounds, blenders   
 ↑ 541.26     stoichiometry   
 ↑ 541.28     quantum chemistry   
 ↑ 541.3     various subects in physical chemistry   
 ↑ 541.33     surface chemistry, adsorption, adhesion   
 ↑ 541.34     chemistry of solutions, colloids   
 ↑ 541.345     colloid chemistry    ≈ `59H 
 ↑ 541.348     solvents   
 ↑ 541.35     photochemistry   
 ↑ 541.36     thermochemistry   
 ↑ 541.363     state changes, phase transformations   
 ↑ 541.368     reactions at extreme temperatures   
 ↑ 541.369     chemical thermodynamics  → 536.7 
 ↑ 541.37     electrochemistry, magnetochemistry   
 ↑ 541.372     electrolytic solutions   
 ↑ 541.378     magnetochemistry   
 ↑ 541.38     radiochemistry   
 ↑ 541.388     isotopes   
 ↑ 541.39     chemical reactions   
 ↑ 541.392     chemical equilibrium   
 ↑ 541.393     oxydo-reduction   
 ↑ 541.394     chemical kinetics   
 ↑ 541.395     catalysis   
 ↑ 542     laboratory techniques, computational chemistry  → 6 
 ↑ 542.8     auxiliary and electronic facilities, data processing   
 ↑ 543     analytical chemistry    ≈ `59B 
 ↑ 543.08     spectroscopy, chromatography [outdated number]   
 ↑ 543.1     bromatological analysis    ≈ S.SPEC.36.CC 
 ↑ 543.17     organic analytical chemistry   
 ↑ 543.2     classical methods    ≈ `59D 
 ↑ 543.22     microchemistry    ≈ `59C 
 ↑ 543.24     volumetric analysis   
 ↑ 543.26     thermal analysis   
 ↑ 543.4     electrochemical analysis   
 ↑ 543.5     optical spectroscopy   
 ↑ 543.6     non-optical spectroscopy   
 ↑ 543.63     radiochemical analysis   
 ↑ 543.8     chromatography   
 ↑ 543.84     liquid-mobile phase chromatography   
 ↑ 543.85     gas chromatography   
 ↑ 546     inorganic chemistry  → 551.9  572.51 
 ↑ 546.2     hydrogen and its compounds   
 ↑ 546.24     acids   
 ↑ 546.3     metals, metallic compounds, alloys  → 620.16  669 
 ↑ 546.34     salts   
 ↑ 546.4     group 3, lantanids, actinids   
 ↑ 546.41     lantanids, rare earths   
 ↑ 546.42     actinids   
 ↑ 546.5     groups 4 to 7: of titanium, vanadium, chrome, manganese   
 ↑ 546.6     groups 8 to 14   
 ↑ 546.625     nickel   
 ↑ 546.671     boron   
 ↑ 546.7     groups 15 to 18: chalcogens, alogens, noble gases   
 ↑ 546.8     periodic law and table   
 ↑ 547     organic chemistry    ≈ `59G 
 ↑ 547.002     techniques, devices, equipment   
 ↑ 547.007     exercices and auxiliary materials in organic chemistry   
 ↑ 547.01     hydrocarbons  → 547.41 
 ↑ 547.02     halogenated compounds   
 ↑ 547.04     nitrogen compounds   
 ↑ 547.05     organometallic compounds   
 ↑ 547.06     sulphur organic compounds   
 ↑ 547.1     physical and theoretical organic chemistry   
 ↑ 547.122     molecular structures, stereochemistry, bonds   
 ↑ 547.128     quantum chemistry   
 ↑ 547.135     photochemistry   
 ↑ 547.137     electrochemistry, magnetochemistry   
 ↑ 547.2     organic reactions   
 ↑ 547.23     oxydoreduction   
 ↑ 547.28     polymerization   
 ↑ 547.4     aliphatic compounds   
 ↑ 547.41     hydrocarbons  → 547.01 
 ↑ 547.413     acetylenes, alchines   
 ↑ 547.5     cyclic compounds   
 ↑ 547.59     heterocycles   
 ↑ 547.593     heteronitrogen compounds, clorophillae, diazines, imidazolos   
 ↑ 547.6     aromatic compounds   
 ↑ 547.7     macromolecules, polymers  → 620.19  668.9 
 ↑ 547.71     terpenes and essential oils   
 ↑ 547.77     lipids   
 ↑ 547.78     carbohydrates   
 ↑ 547.8     other organic substances   
 ↑ 547.84     elastomers, resins, lignin   
 ↑ 547.86     colourants and pigments   
 ↑ 548     crystallography    ≈ `47A  `47C 
 ↑ 548.021     formulas   
 ↑ 548.3     crystallochemistry    ≈ `48BC  `58E 
 ↑ 548.5     crystallization   
 ↑ 548.7     mathematical crystallography    ≈ `48BD 
 ↑ 548.8     physical and structural crystallography    ≈ `47B  `47H 
 ↑ 548.81     structural crystallography   
 ↑ 548.83     diffractometric methods   
 ↑ 548.9     optical crystallography    ≈ `47F  `48B 
 ↑ 549     mineralogy  → 552  ≈ `25B  `44C 
 ↑ 549.1     determinative mineralogy    ≈ `49F  `49H 
 ↑ 549.6     silicates    ≈ `45H 
 ↑ 549.67     phyllosilicates, clay minerals  → 553.6  ≈ `32G 
 ↑ 549.9     geography of minerals    ≈ `45B  `45C 
55     Earth science   
 ↑ 550     Earth science in general   
 ↑ 550.11     models in Earth science    ≈ `18B 
 ↑ 550.28     remote sensing  → 006.6  526.9  621.367  910.28  ≈ `17C  OE11 
 ↑ 551     geology and hydrology  → 622  ≈ :ZA.12  `30AR 
 ↑ 551.072     geological survey  → 912  ≈ `17B  `21A 
 ↑ 551.1     Earth structure and properties    ≈ `19A  `24A 
 ↑ 551.2     volcanoes, earthquakes, thermal water and gases  → 904.5 
 ↑ 551.21     volcanology    ≈ `21F 
 ↑ 551.22     seismology, earthquakes  → 620.3  624176  ≈ `21E  `24B 
 ↑ 551.23     thermal water and gases    ≈ `23E  `31G 
 ↑ 551.3     surface processes, rock fall, landslides  → 624.151  631.4  ≈ `20D  `32E 
 ↑ 551.31     glaciology    ≈ `13D 
 ↑ 551.4     geomorphology and hydrosphere   
 ↑ 551.41     geomorphology  → 910.02  ≈ `12A  GE4 
 ↑ 551.46     oceanography, underwater geology    ≈ `11B 
 ↑ 551.48     hydrology, surface waters  → 532  627  ≈ `10B 
 ↑ 551.483     rivers, streams   
 ↑ 551.489     floods   
 ↑ 551.49     hydrogeology, ground waters  → 628.1  ≈ `10A 
 ↑ 551.5     meteorology    ≈ S.SPEC.39.EA 
 ↑ 551.6     climatology, weather    ≈ `13A 
 ↑ 551.7     historical geology    ≈ `17D  `19B 
 ↑ 551.8     structural geology    ≈ `18A  `19C 
 ↑ 551.9     geochemistry  → 546  ≈ `10I  `25A 
 ↑ 552     petrology  → 549  ≈ `25B 
 ↑ 552.06     rock composition, structure and analysis    ≈ `10C  `10E 
 ↑ 552.1     igneous rocks   
 ↑ 552.4     metamorphic rocks   
 ↑ 552.5     sedimentary rocks    ≈ `29A  `31A 
 ↑ 553     economic and applied geology, layers  → 622  ≈ `23B  `23C 
 ↑ 553.2     hydrocarbons, fuels    ≈ `23A  `23D 
 ↑ 553.6     clays, sands, salts  → 549.67  ≈ `32H 
 ↑ 553.7     water   
 ↑ 554     Earth sciences of Europe    ≈ `15A  `30AB 
 ↑ 554.5     Earth sciences of Italy    ≈ `15B  `16B 
 ↑ 554.51     Earth sciences of Northern Italy and the Alps    ≈ `16A  `30C 
 ↑ 555     Earth sciences of Asia    ≈ `14A 
 ↑ 556     Earth sciences of Africa    ≈ `14A  `30F 
 ↑ 557     Earth sciences of Northern America    ≈ `14A 
 ↑ 558     Earth sciences of Southern America    ≈ `14A 
 ↑ 559     Earth sciences of Antarctica and islands    ≈ `14A 
56     palaeontology   
 ↑ 560     palaeobiology in general    ≈ `26A  `31D 
 ↑ 561     palaeobotany and micropalaeontology    ≈ S.SPEC.40.ED  `26B 
 ↑ 562     invertebrate palaeontology    ≈ `27A  `27B 
 ↑ 567     fossil fishes, amphibians and reptiles    ≈ `28B 
 ↑ 568     fossil birds    ≈ `28B 
 ↑ 569     fossil mammals    ≈ `28B 
 ↑ 569.9     fossil hominids  → 599.9 
57     biology  → 660 
 ↑ 570     general biology    ≈ S.SPEC.30.BC 
 ↑ 570.12     biological systematics   
 ↑ 571     physiology in general  → 612 
 ↑ 571.1     animal physiology    ≈ S.SPEC.29.BB 
 ↑ 571.2     plant and microrganism physiology  → 581  ≈ S.SPEC.35.CA  
 ↑ 571.3     comparative anatomy  → 611 
 ↑ 571.31     animal anatomy  → 591 
 ↑ 571.5     histology  → 611.018  ≈ S.SPEC.29.BA 
 ↑ 571.6     cell biology  → 572.8  611.018  ≈ S.SPEC.29.BA 
 ↑ 571.64     membranes   
 ↑ 571.8     reproduction, development, embryology  → 612.64 
 ↑ 571.9     general pathology  → 616 
 ↑ 571.96     immunology   
 ↑ 571.978     carcinogenesis  → 616.99 
 ↑ 571.99     parassitology  → 616.96  616.98 
 ↑ 572     biochemistry  → 612.015  660.6  ≈ `59I  S.SPEC.36.CB 
 ↑ 572.2     biochemistry of plants and microorganisms  → 581 
 ↑ 572.4     metabolism   
 ↑ 572.49     fermentation  → 663 
 ↑ 572.5     various chemical substances   
 ↑ 572.51     bioinorganic chemistry, trace elements   → 546 
 ↑ 572.56     carbohydrates   
 ↑ 572.6     proteins   
 ↑ 572.65     protein components   
 ↑ 572.7     enzymes   
 ↑ 572.8     molecular biology, biochemical genetics  → 571.6  576.5 
 ↑ 573     specific systems   
 ↑ 573.4     endocrinology   
 ↑ 576     genetics, evolution  → 579  599.93 
 ↑ 576.5     general genetics  → 572.8  581.3  591.3  599.93  ≈ S.SPEC.29.BB 
 ↑ 576.54     variation, mutation   
 ↑ 576.58     population genetics  → 577.8 
 ↑ 576.8     evolution    ≈ S.SPEC.27.AQ 
 ↑ 576.83     origins of life   
 ↑ 577     ecology  → 304.2  333.95  344  363.7 
 ↑ 577.6     hydrobiology, freshwater ecology    ≈ S.SPEC.32.BI 
 ↑ 577.8     synecology, population biology  → 576.58  719 
 ↑ 577.85     symbiosis and parasitism   
 ↑ 578     natural history   
 ↑ 579     microbiology, fungus, algae  → 576  616.01  ≈ S.SPEC.26.AM  S.SPEC.30.BE 
 ↑ 579.2     virology  → 616.91  ≈ S.SPEC.32.BG 
 ↑ 579.3     prokaryotes, bacteria  → 616.92  632.32 
 ↑ 579.5     fungus, mycology  → 616.969  ≈ MICOL.  Sez.Mic 
 ↑ 579.52        
 ↑ 579.53       → 581.2 
 ↑ 579.54        
 ↑ 579.55        
 ↑ 579.56        
 ↑ 579.563       → 664 
 ↑ 579.57        
 ↑ 579.59        
 ↑ 579.6     mushrooms   
 ↑ 579.7        
 ↑ 579.8     algae    ≈ S.SPEC.19.AA 
58     botany   
 ↑ 580     botany in general  → 630  ≈ S.SPEC.20.AC 
 ↑ 580.12     systematic botany    ≈ S.FLORE.G 
 ↑ 580.73     botanical gardens    ≈ S.SPEC.20.AB 
 ↑ 580.74     botanical museums, herbariums   
 ↑ 580.9     history of botany    ≈ S.SPEC.20.AB 
 ↑ 581     plant characters, genetics and ecology  → 571.2  572.2 
 ↑ 581.3     plant genetics and physiology  → 576.5  631.52 
 ↑ 581.6     plant uses and effects   
 ↑ 581.634     medicinal plants  → 615.321 
 ↑ 581.7     plants of special environments, plant ecology  → 577  ≈ S.SPEC.24.AH 
 ↑ 581.9     phytogeography, floras    ≈ S.SPEC.24.AH  S.FLORE 
 ↑ 581.94     plants of Europe    ≈ S.FLORE.H  S.FLORE.I 
 ↑ 581.945     plants of Italy    ≈ S.FLORE.C 
 ↑ 581.95     plants of Asia    ≈ S.FLORE.F 
 ↑ 581.955     plants of Iran    ≈ S.FLORE.M 
 ↑ 581.96     plants of Africa    ≈ S.FLORE.L 
 ↑ 581.97     plants of North and Central America    ≈ S.FLORE.M  S.SPEC.41.FC 
 ↑ 581.98     plants of South America    ≈ S.FLORE.N  S.SPEC.41.FB 
 ↑ 582     phanerogams, spermatophytes  → 635.9 
 ↑ 582.0463     flowers and their parts    ≈ S.SPEC.28.AR 
 ↑ 586     cryptogams    ≈ S.SPEC.25.AL  S.SPEC.26.AN 
59     zoology   
 ↑ 590     zoology in general    ≈ S.SPEC.31.BE 
 ↑ 591     animal biology  → 571.31 
 ↑ 591.3     animal genetics  → 576.5 
 ↑ 591.5     ethology  → 304.5 
 ↑ 591.59     animal communication   
 ↑ 592     lower invertebrates, worms   
 ↑ 595     entomology, arthropods  → 614.17  632.7 
 ↑ 597     cold-blooded vertebrates, fish   
 ↑ 597.9     amphibians and reptiles   
 ↑ 598     birds   
 ↑ 599     mammals   
 ↑ 599.9     humans, physical anthropology  → 320  569.9 
 ↑ 599.93     human genetics and evolution  → 576 
 ↑ 599.935     human genetics  → 320  576.5  616.04 
6     applied sciences   
60     technology    
 ↑ 600     applied sciences in general   
 ↑ 602     handbooks   
 ↑ 603     technical dictionaries and encyclopaedias  → 423  503 
 ↑ 604     technical drawing  → 720.284 
 ↑ 607     education of technicians and engineers, research  → 378  620 
 ↑ 607.2     technological research, statistical methods   
 ↑ 608     patents  → 346.048 
 ↑ 609     history of technology  → 620.009 
61     medicine   
 ↑ 610     medicine in general  → 174.2  780.061  ≈ S.SPEC.33.BL 
 ↑ 610.15     biomedical models   
 ↑ 610.153     medical physics   
 ↑ 610.28     biomedical instrumentation  → 538.36  616.075  660 
 ↑ 610.285     computer applications for medicine  → 006 
 ↑ 610.69     medical staff  → 344.041 
 ↑ 610.72     medical statistics  → 519 
 ↑ 610.73     nursing   
 ↑ 611     human anatomy  → 571.3  616 
 ↑ 611.018     human cytology and histology  → 571.5  571.6 
 ↑ 611.1     anatomy of the circulatory system  → 612.1  616.1 
 ↑ 611.2     anatomy of the respiratory system  → 612.2  616.2 
 ↑ 611.3     anatomy of the digestive system  → 612.3  616.3 
 ↑ 611.6     anatomy of the urinary system  → 612.6  616.6 
 ↑ 611.7     anatomy of the muscular and skeletal system  → 612.7  616.7 
 ↑ 611.8     nervous system anatomy  → 152  612.8  616.8 
 ↑ 612     human physiology  → 571 
 ↑ 612.014     biophysics, radiobiology  → 530 
 ↑ 612.015     medical biological chemistry  → 572 
 ↑ 612.1     physiology of circulatory system  → 611.1  616.1 
 ↑ 612.2     pneumology  → 611.2  616.2 
 ↑ 612.3     physiology of digestive system  → 611.3  616.3  641 
 ↑ 612.4     endocrine system  → 616.4 
 ↑ 612.6     human reproduction and growth  → 611.6  616.6 
 ↑ 612.64     human embryology  → 571.8 
 ↑ 612.7     bones, muscles and movement, biomechanics  → 611.7  613.7  616.7  620.1 
 ↑ 612.8     nervous system physiology  → 152  611.8  615.78  616.8 
 ↑ 612.804     neurochemistry, cerebrospinal fluid   
 ↑ 613     hygiene, health   
 ↑ 613.2     nutrition   
 ↑ 613.62     occupational medicine   
 ↑ 613.7     physical fitness  → 612.7  796 
 ↑ 613.8     abuse of substances  → 615.9 
 ↑ 614     public health  → 344  362.1  725.5 
 ↑ 614.1     legal medicine, forensic pathology  → 363.25 
 ↑ 614.17     forensic anthropology and entomology  → 364  595 
 ↑ 615     pharmacology, terapeutics  → 344.042 
 ↑ 615.1     drugs   
 ↑ 615.10033     drugs and economics  → 338 
 ↑ 615.11     pharmacopoeia   
 ↑ 615.19     pharmaceutical chemistry and technology  → 660.6 
 ↑ 615.1901     pharmaceutical chemical analysis   
 ↑ 615.19C     pharmaceutical chemistry   
 ↑ 615.19T     pharmaceutical technology   
 ↑ 615.3     organic drugs   
 ↑ 615.321     plant-derived drugs, phytotherapy, pharmacognosis  → 581.634  ≈ S.SPEC.22.AF 
 ↑ 615.328     vitamins   
 ↑ 615.329     drugs from microorganisms, fungi, algae, antibiotics    ≈ S.SPEC.37.CE 
 ↑ 615.36     animal-derived drugs, hormones   
 ↑ 615.4     recipe preparation   
 ↑ 615.5     therapeutics   
 ↑ 615.6     administering methods   
 ↑ 615.7     pharmacokinetics   
 ↑ 615.78     drugs active on nervous system   → 612.8  616.891 
 ↑ 615.8     radio- and chemiotherapy   
 ↑ 615.9     toxicology   → 613.8 
 ↑ 615.902      industrial toxicology  → 363.7 
 ↑ 616     pathology, clinics, internal medicine  → 571.9  611 
 ↑ 616.007     studying, admittance exams   
 ↑ 616.01     medical microbiology  → 579 
 ↑ 616.025     urgent diseases   
 ↑ 616.042     medical genetics  → 599.935 
 ↑ 616.07     physiopathology   
 ↑ 616.075     diagnosis and prognosis, bioimages  → 610.28 
 ↑ 616.0756     chemical diagnosis, clinical chemistry   
 ↑ 616.079     immunology   
 ↑ 616.1     cardiovascular diseases  → 611.1  612.1  617.41 
 ↑ 616.12     cardiology   
 ↑ 616.123     coronariopatias, myocardial infarction   
 ↑ 616.128     arrhythmia   
 ↑ 616.13     aterosclerosis   
 ↑ 616.132     hypertension   
 ↑ 616.136     arteriosclerosis   
 ↑ 616.15     hematology   
 ↑ 616.2     pneumology  → 611.2  612.2  618.922 
 ↑ 616.3     gastroenterology  → 611.3  612.3 
 ↑ 616.39     obesity   
 ↑ 616.4     endocrinology  → 612.4 
 ↑ 616.5     dermatology   
 ↑ 616.6     nephrology   
 ↑ 616.7     orthopedics  → 612.7  617.3  617.47 
 ↑ 616.72     arthritis, rheumatism   
 ↑ 616.8     neurology  → 612.8  617.48  618.928 
 ↑ 616.89     psychiatry  → 153 
 ↑ 616.891     therapy, drug therapy  → 615.78 
 ↑ 616.9     oncology and infectuous diseases  → 618.929  ≈ S.SPEC.23.AF 
 ↑ 616.91     viral diseases  → 579.2 
 ↑ 616.92     bacterial diseases  → 579.3 
 ↑ 616.96     parasitosis and mycosis  → 571.99 
 ↑ 616.969     mycosis, fungal diseases   → 579.5 
 ↑ 616.97     allergology   
 ↑ 616.98     environmental and climate diseases  → 571.99 
 ↑ 616.99     tumours  → 571.978 
 ↑ 616.994     cancers, chemiotherapy   
 ↑ 616.99465     female cancers  → 618.1 
 ↑ 617     surgery, prostheses   
 ↑ 617.05     surgical tools and techniques  → 617.9 
 ↑ 617.1     traumatology   
 ↑ 617.3     orthopedics  → 616.7 
 ↑ 617.41     cardiovascular surgery  → 616.1 
 ↑ 617.47     orthopedic surgery  → 616.7 
 ↑ 617.48     neural surgery  → 616.8 
 ↑ 617.6     dentistry   
 ↑ 617.7     ophthalmology   
 ↑ 617.89     hearing correction    ≈ 617.89 
 ↑ 617.9     surgery techniques  → 617.05  618.1059 
 ↑ 617.96     anaesthetic   
 ↑ 618     gynecology, obstetrics, pediatrics, geriatrics   
 ↑ 618.1     gynecology  → 616.99465 
 ↑ 618.1059     gynecological surgical techniques  → 617.9 
 ↑ 618.9     pediatrics and geriatrics   
 ↑ 618.92     pediatrics   
 ↑ 618.922     pediatric diseases of the respiratory tract  → 616.2 
 ↑ 618.928     pediatric diseases of nervous system  → 616.8 
 ↑ 618.929     contagious diseases  → 616.9 
 ↑ 618.97     geriatrics   
62     engineering   
 ↑ 620     engineering in general  → 607 
 ↑ 620.0042     engineering design, AutoCAD  → 006.6 
 ↑ 620.009     history of engineering  → 609 
 ↑ 620.1     mechanics and materials  → 531  612.7  621.8  624.1 
 ↑ 620.11     materials, tests, alteration   → 363.1  681.2 
 ↑ 620.112     material properties, tests  → 624.171  ≈ :ZA.3 
 ↑ 620.13     walling materials  → 624.183  693.5 
 ↑ 620.14     ceramics, bricks and analogous materials  → 666  ≈ `32H 
 ↑ 620.16     metals  → 546.3  624.182  669 
 ↑ 620.17     iron, steel  → 624.182 
 ↑ 620.19     other materials, polymers  → 547.7  668.9 
 ↑ 620.2     applied acoustics  → 534 
 ↑ 620.3     mechanic vibration  → 551.22  624.176 
 ↑ 620.4     fine particle and surface technology   
 ↑ 620.5     nanotechnology   
 ↑ 620.8     ergonomy   
 ↑ 621     applied physics   
 ↑ 621.2     hydraulic machinery  → 627 
 ↑ 621.3     electrotechnics  → 537 
 ↑ 621.31     electrical energy  → 333.7 
 ↑ 621.312     generation, transformation, accumulation   
 ↑ 621.317     control devices   
 ↑ 621.319     transmission, electrical plants   
 ↑ 621.32     electric enlightenment    ≈ 729.28  
 ↑ 621.36     optical engineering  → 006.6  535 
 ↑ 621.366     lasers   
 ↑ 621.367     technical photography, photoptics  → 550.28 
 ↑ 621.369     fiber, integrated, nonlinear optics  → 621.3827 
 ↑ 621.37     tests and measures of electrical quantities   
 ↑ 621.38     electronic and communication engineering   
 ↑ 621.381     electronics    
 ↑ 621.381045     photodetectors   
 ↑ 621.3813     microwaves  → 530.14 
 ↑ 621.3815     components and circuits, CMOSs  → 621.395  681 
 ↑ 621.38152     semiconductors   
 ↑ 621.38154     photoelectric, test and measure components   
 ↑ 621.3817     microelectronics   
 ↑ 621.382     communication engineering  → 539.2 
 ↑ 621.3822     signal processing   
 ↑ 621.3824     antennas and propagation   
 ↑ 621.3825     relays, satellites   
 ↑ 621.3827     optical communication and fibers  → 621.369 
 ↑ 621.384     radios, radars   
 ↑ 621.39     computer engineering  → 4 
 ↑ 621.395     logical networks, VLSI  → 621.3815  681 
 ↑ 621.398     interfaces, communication, devices   
 ↑ 621.4     heat engineering, engines  → 536.7 
 ↑ 621.46     electric motors   
 ↑ 621.47     solar energy engineering  → 720.47 
 ↑ 621.48     nuclear engineering  → 539.7 
 ↑ 621.5     pneumatics, void, low temperatures   
 ↑ 621.8     machinery engineering  → 620.1 
 ↑ 621.89     tribology   
 ↑ 621.9     tools   
 ↑ 621483     nuclear reactors and power plants   
 ↑ 622     mining engineering  → 338.2  553  ≈ `8Bmin  `8Fmin 
 ↑ 622.2     excavation techniques    ≈ `23F 
 ↑ 622.3     mining special minerals    ≈ `8Cmin 
 ↑ 622.33     hydrocarbons excavation  → 338.2728 
 ↑ 623     military and naval engineering  → 355 
 ↑ 624     civil engineering  → 531.3  690 
 ↑ 624.1     structural engineering and underground building technology    ≈ `20A 
 ↑ 624.15     building technology    ≈ `20B  `20F 
 ↑ 624.151     geotechnics, soil mechanics  → 551.3  ≈ `20G  `22A 
 ↑ 624.17     structural systems, building science  → 519.4  620.1 
 ↑ 624.171     structural analysis  → 620.112 
 ↑ 624.176     seismic engineering  → 363.3  551.22  620.3  693.85 
 ↑ 624.18     materials  → 691 
 ↑ 624.182     metal structures: iron, steel, aluminium  → 620.16  620.17  669  693.7 
 ↑ 624.183     masonry structures  → 620.13 
 ↑ 624.184     wooden structures  → 694 
 ↑ 624.2     bridges  → 725 
 ↑ 625     railway and road engineering  → 711.7  725.3 
 ↑ 625.1     railways  → 385 
 ↑ 625.7     roads  → 629.2 
 ↑ 627     hydraulic engineering  → 551.48  621.2 
 ↑ 627.1     inland waters  → 714 
 ↑ 627.12     streams   
 ↑ 627.13     canals  → 386.4 
 ↑ 627.14     lakes   
 ↑ 627.2     harbours   
 ↑ 627.5     land improvement and irrigation  → 631.5 
 ↑ 627.54     drainage   
 ↑ 627.8     dams and reservoirs   
 ↑ 628     sanitary engineering, sewers, wastewater  → 696 
 ↑ 628.1     water provision  → 551.49 
 ↑ 628.16     analysis, treatment, countermeasures to pollution  → 363.7  628.5 
 ↑ 628.2     sewers   
 ↑ 628.3     wastewater treatment and disposal   
 ↑ 628.4     trash    ≈ AM4 
 ↑ 628.5     pollution control techniques  → 363.7  628.16  ≈ S.SPEC.37.CF 
 ↑ 628.53     air pollution   
 ↑ 628.9     fire prevention  → 363.1  ≈ AR16 
 ↑ 629     transport engineering, automatic controls  → 711.4 
 ↑ 629.1     aerospace engineering  → 358.4 
 ↑ 629.2     land vehicles  → 343.094  625.7 
 ↑ 629.4     astronautics   
 ↑ 629.8     automatic control engineering  → 003.5  006.3  152 
63     agriculture   
 ↑ 630     agriculture in general  → 338.1  343.076  580  ≈ S.SPEC.21.AE 
 ↑ 631     techniques, tools, materials   
 ↑ 631.4     soil science  → 551.3  ≈ S.SPEC.40.EB 
 ↑ 631.5     cultivation and harvesting   → 627.5 
 ↑ 631.52     seed and variety production, agricultural genetics  → 581.3 
 ↑ 631.53     plant breeding   
 ↑ 632     plant pathology, biological and chemical control  → 581  668.6  ≈ S.SPEC.34.HA 
 ↑ 632.32     bacterial diseases of plants  → 579.3  ≈ S.SPEC.21.AD 
 ↑ 632.7     noxious insects, agricultural entomology  → 595 
 ↑ 632.9     pesticides    ≈ S.SPEC.27.AP 
 ↑ 632.95     pesticides  → 363.7 
 ↑ 633     field and plantation crops   
 ↑ 633.1     grain growth    ≈ S.SPEC.28.AT 
 ↑ 633.5     fiber cultivations  → 338.17 
 ↑ 633.7     cultivation of alkaloid plants, tobacco, cacao    ≈ S.SPEC.23.AG  S.SPEC.25.AI 
 ↑ 634     arboriculture, fruit farming    ≈ S.SPEC.27.AO 
 ↑ 634.8     viticulture  → 663.2 
 ↑ 635     horticulture, vegetables, gardening    ≈ S.FLORE.A 
 ↑ 635.9     floriculture, ornamental plants  → 582  712  ≈ S.FLORE.B 
 ↑ 636     husbandry, breeding    ≈ S.SPEC.32.BF 
 ↑ 639.9     conservation  → 333.72 
64     home management, food   
 ↑ 641     food, hunting and fishing  → 612.3  664 
65     business, management  → 338 
 ↑ 658     organization and management  → 338 
 ↑ 658.4     executive management  → 519.7  ≈ :R.1 
 ↑ 658.401     planning, control  → 658.5 
 ↑ 658.403     decisions, information management  → 006.31  153.8  519.53 
 ↑ 658.5     production, quality control   → 658.401 
 ↑ 658.8     distribution, sale, marketing, e-business   
66     applied chemistry, food technology   
 ↑ 660     laboratory techniques, biotechnology in general  → 572  610.28  ≈ `59E 
 ↑ 660.28     chemical plants and activities  → 540 
 ↑ 660.284     unit operations and processes   
 ↑ 660.29     applied physical chemistry, electrochemistry  → 541 
 ↑ 660.6     biotechnology  → 615.19 
 ↑ 663     beverage technology  → 572.49 
 ↑ 663.2     oenology  → 634.8  ≈ S.SPEC.28.AS 
 ↑ 664     food technology  → 344.042  579.563  641 
 ↑ 666     ceramic and analogous technologies   → 620.14  738 
 ↑ 666.1     glass   
 ↑ 666.7     refractory materials, building clay products   
 ↑ 667     technology of cleaning, colour and upholstery  → 729 
 ↑ 667.2     dyes and pigments   
 ↑ 668     technology of other organic products   
 ↑ 668.1     surfactants   
 ↑ 668.4     plastics   
 ↑ 668.5     perfumes, cosmetics   
 ↑ 668.6     agricultural chemical substances, pesticides  → 632 
 ↑ 668.9     polymers  → 547.7  620.19 
 ↑ 669     metallurgy  → 546.3  620.16  624.18  671  ≈ `59F 
 ↑ 669.9     chemical and physical metallurgy   
67     manufacturing   
 ↑ 671     metal processing, galvanoplastics  → 669 
 ↑ 677     textiles   
 ↑ 681     precision instruments  → 621.3815 
 ↑ 681.2     test and measurement tools, sensors  → 530.8  620.11 
 ↑ 686     printing   
69     building   
 ↑ 690     building in general  → 624  720 
 ↑ 690.1     structural elements  → 721 
 ↑ 690.16     lofts   
 ↑ 690.18     openings, doors and windows  → 729.28 
 ↑ 690.2     activities on buildings  → 346.045  ≈ AR18 
 ↑ 690.22     safety actions in building  → 344  ≈ AR24 
 ↑ 690.24     maintenance and restoration  → 720.28 
 ↑ 691     building materials  → 624.18  721.04 
 ↑ 693     buildings of special materials and purposes  → 721.04 
 ↑ 693.1     stone   <