| ↑ | STA16 | Market researches |  ≈ 658.83 |
| ↑ | STA3C | Health statistics | ≈ 310 616 |
| ↑ | 24 | | → 658.4 |
| ↑ | 241 | | → 658.4 |
| ↑ | 242 | | → 658.4 |
| ↑ | 243 | | → 658.4 |
| ↑ | 244 | | → 658.4 |
| ↑ | 245 | | → 658.4 |
| ↑ | 246 | | → 658.4 |
| ↑ | 249 | | → 658.4 |
| ↑ | 53 | | → 658.8 |
| ↑ | 54 | | → 657 |
| ↑ | 71 | | → 630 |
| ↑ | 003.5 | communication and control theory, cybernetics | → 629.8 ≈ :N.3 |
| ↑ | 004 | hardware, networks, computer science generally | → 519.4 621.39 ≈ :P.0 |
| ↑ | 006 | methods, applications | → 542 610.285 |
| ↑ | 006.3 | artificial intelligence | → 629.8 ≈ AI1 AI2 |
| ↑ | 006.31 | machine learning, data mining | → 005.74 519.54 658.403 |
| ↑ | 006.6 | digital images | → 550.28 620.0042 621.36 |
| ↑ | 152 | perception, emotions | → 611.8 612.8 629.8 |
| ↑ | 153 | mental processes, understanding | → 001.5 591.513 616.89 |
| ↑ | 153.8 | will, choice, decisions | → 658.403 |
| ↑ | 174.2 | | → 610 |
| ↑ | 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 |
| ↑ | 338 | production, microeconomics | → 658 |
| ↑ | 338.1 | agricultural economics | → 630 |
| ↑ | 338.2 | mining economics | → 622 |
| ↑ | 338.2728 | oil economics | → 622.33 915.6 |
| ↑ | 343.076 | agriculture regulation | → 343.45076 630 |
| ↑ | 343.094 | road transport law | → 343.45094 363.125 629.2 |
| ↑ | 344 | social law, safety, environment, nature reserves | → 333.72 363 614 690.22 ≈ S.SPEC.32.BJ e al Botta 2 |
| ↑ | 344.041 | healthcare staff law | → 344.45041 610.69 |
| ↑ | 344.042 | laws on food and drugs | → 344.45042 615 664 |
| ↑ | 346.045 | land planning | → 690.2 711.4 |
| ↑ | 346.048 | copyright, patents and trade marks law | → 346.45048 608 |
| ↑ | 355 | military science | → 358.4 359 623 |
| ↑ | 358.4 | air force and operations | → 355 629.1 |
| ↑ | 362.1 | health services | → 614 |
| ↑ | 363.1 | public security | → 620.11 628.9 |
| ↑ | 363.125 | road transportation risk | → 343.094 629.213 |
| ↑ | 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 |
| ↑ | 385 | rail transport | → 625.1 |
| ↑ | 386.4 | transport via canals | → 627.13 |
| ↑ | 423 | English dictionaries | → 503 603 ≈ :C.92 |
| ↑ | 503 | scientific dictionaries and encyclopedias | → 423 603 |
| ↑ | 519 | probability, statistics, applied maths | → 610.72 ≈ :N.0 S.SPEC.42.GB |
| ↑ | 519.53 | descriptive statistics, multivariate analysis | → 658.403 |
| ↑ | 519.7 | programming theory, operations research | → 005.1 658.4 ≈ R.1 |
| ↑ | 530 | physics in general | → 612.014 ≈ `60D |
| ↑ | 530.14 | fields and waves | → 621.3813 |
| ↑ | 530.8 | measurement | → 681.2 |
| ↑ | 531 | classical mechanics, continuum mechanics | → 516.36 530.15 620.1 ≈ :ZA.1 |
| ↑ | 531.3 | solid dynamics | → 624 ≈ :ZA.3 |
| ↑ | 534 | sound and vibrations | → 620.2 |
| ↑ | 535 | optics | → 621.36 ≈ :ZA.7 |
| ↑ | 536.7 | thermodynamics | → 530.13 541.369 621.4 ≈ :ZA.5 |
| ↑ | 538.36 | magnetic resonance | → 610.28 |
| ↑ | 539.2 | radiations | → 621.382 |
| ↑ | 539.7 | atomic and nuclear physics | → 621.48 ≈ :ZA.9 |
| ↑ | 540 | chemistry in general | → 016.54 660.28 ≈ `59A S.SPEC.36.CB |
| ↑ | 541 | physical chemistry | → 660.29 ≈ `60A |
| ↑ | 542 | laboratory techniques, computational chemistry | → 6 |
| ↑ | 546.3 | metals, metallic compounds, alloys | → 620.16 669 |
| ↑ | 547.7 | macromolecules, polymers | → 620.19 668.9 |
| ↑ | 550.28 | remote sensing | → 006.6 526.9 621.367 910.28 ≈ `17C OE11 |
| ↑ | 551 | geology and hydrology | → 622 ≈ :ZA.12 `30AR |
| ↑ | 551.22 | seismology, earthquakes | → 620.3 624.176 ≈ `21E `24B |
| ↑ | 551.3 | surface processes, rock fall, landslides | → 624.151 631.4 ≈ `20D `32E |
| ↑ | 551.303 | sediment transportation and deposit | → 532.05 627.1 |
| ↑ | 551.48 | hydrology, surface waters | → 532 627 ≈ `10B |
| ↑ | 551.49 | hydrogeology, ground waters | → 628.1 ≈ `10A |
| ↑ | 553 | economic and applied geology, layers | → 622 ≈ `23B `23C |
| 57 | biology | → 660 |
| ↑ | 571 | physiology in general | → 612 |
| ↑ | 571.3 | comparative anatomy | → 611 |
| ↑ | 571.5 | animal histology | → 611.018 ≈ S.SPEC.29.BA |
| ↑ | 571.6 | cell biology | → 572.8 611.018 ≈ S.SPEC.29.BA |
| ↑ | 571.8 | reproduction, development, embryology | → 612.64 |
| ↑ | 571.9 | general pathology | → 616 |
| ↑ | 571.978 | carcinogenesis | → 616.99 |
| ↑ | 571.99 | parassitology | → 616.96 616.98 |
| ↑ | 572 | biochemistry | → 612.015 660.6 ≈ `59I S.SPEC.36.CB |
| ↑ | 572.49 | fermentation | → 663 |
| ↑ | 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 |
| ↑ | 579.563 | | → 664 |
| ↑ | 580 | botany in general | → 630 ≈ S.SPEC.20.AC |
| ↑ | 581.3 | plant genetics and physiology | → 576.5 631.52 |
| ↑ | 581.634 | medicinal plants | → 615.321 |
| ↑ | 582 | phanerogams, spermatophytes | → 635.9 |
| ↑ | 582.13 | flowers | → 635.9 |
| ↑ | 595 | entomology, arthropods | → 614.17 632.7 |
| ↑ | 599.935 | human genetics | → 320 576.5 616.04 |
| ↑ | 607 | education of technicians and engineers, research | → 378 620 |
| ↑ | 609 | history of technology | → 620.009 |
| ↑ | 610.28 | biomedical instrumentation | → 538.36 616.075 660 |
| ↑ | 611 | human anatomy | → 571.3 616 |
| ↑ | 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 |
| ↑ | 612.1 | physiology of circulatory system | → 611.1 616.1 |
| ↑ | 612.2 | pneumology | → 611.2 616.2 |
| ↑ | 612.3 | physiology of digestive system | → 611.3 613.2 616.3 641 |
| ↑ | 612.4 | endocrine system | → 616.4 |
| ↑ | 612.6 | human reproduction and growth | → 611.6 616.6 |
| ↑ | 612.7 | bones, muscles and movement, biomechanics | → 611.7 613.7 616.7 620.1 |
| ↑ | 612.76 | locomotion, physical exercise, rest | → 613.71 |
| ↑ | 612.8 | nervous system physiology | → 152 611.8 615.78 616.8 |
| ↑ | 613.2 | nutrition | → 612.3 641 |
| ↑ | 613.7 | physical fitness | → 612.7 |
| ↑ | 613.71 | physical exercise and sport activities | → 612.76 796 |
| ↑ | 613.8 | abuse of substances | → 615.9 |
| ↑ | 615.19 | pharmaceutical chemistry and technology | → 660.6 |
| ↑ | 615.78 | drugs active on nervous system | → 612.8 616.891 |
| ↑ | 615.9 | toxicology
| → 613.8 |
| ↑ | 616 | pathology, clinics, internal medicine | → 571.9 611 |
| ↑ | 616.075 | diagnosis and prognosis, bioimages | → 610.28 |
| ↑ | 616.1 | cardiovascular diseases | → 611.1 612.1 617.41 |
| ↑ | 616.2 | pneumology | → 611.2 612.2 618.922 |
| ↑ | 616.3 | gastroenterology | → 611.3 612.3 |
| ↑ | 616.4 | endocrinology | → 612.4 |
| ↑ | 616.7 | orthopedics | → 612.7 617.3 617.47 |
| ↑ | 616.8 | neurology | → 612.8 617.48 618.928 |
| ↑ | 616.891 | therapy, drug therapy | → 615.78 |
| ↑ | 616.9 | oncology and infectuous diseases | → 618.929 ≈ S.SPEC.23.AF |
| ↑ | 616.99465 | female cancers | → 618.1 |
| ↑ | 617.05 | surgical tools and techniques | → 617.9 |
| ↑ | 617.3 | orthopedics | → 616.7 |
| ↑ | 617.41 | cardiovascular surgery | → 616.1 |
| ↑ | 617.47 | orthopedic surgery | → 616.7 |
| ↑ | 617.48 | neural surgery | → 616.8 |
| ↑ | 617.89 | hearing correction | ≈ 617.89 |
| ↑ | 617.9 | surgery techniques | → 617.05 618.1059 |
| ↑ | 618.1 | gynecology | → 616.99465 |
| ↑ | 618.1059 | gynecological surgical techniques | → 617.9 |
| ↑ | 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 |
| ↑ | 620 | engineering in general | → 607 |
| ↑ | 620.009 | history of engineering | → 609 |
| ↑ | 620.1 | mechanics and materials | → 531 612.7 621.8 624.151 |
| ↑ | 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 |
| ↑ | 620.3 | mechanic vibration | → 551.22 624.176 |
| ↑ | 621.2 | hydraulic machinery | → 627 |
| ↑ | 621.369 | fiber, integrated, nonlinear optics | → 621.3827 |
| ↑ | 621.3815 | components and circuits, CMOSs | → 621.395 681 |
| ↑ | 621.3827 | optical communication and fibers | → 621.369 |
| ↑ | 621.395 | logical networks, VLSI | → 621.3815 681 |
| ↑ | 621.8 | machinery engineering | → 620.1 |
| ↑ | 624 | civil engineering | → 531.3 690 |
| ↑ | 624.151 | geotechnics, soil mechanics | → 551.3 620.1 ≈ `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 |
| ↑ | 625.7 | roads | → 629.2 |
| ↑ | 627 | hydraulic engineering | → 551.48 621.2 |
| ↑ | 627.5 | land improvement and irrigation | → 631.5 |
| ↑ | 628 | sanitary engineering, sewers, wastewater | → 696 |
| ↑ | 628.16 | analysis, treatment, countermeasures to pollution | → 363.7 628.5 |
| ↑ | 628.5 | pollution control techniques | → 363.7 628.16 ≈ S.SPEC.37.CF |
| ↑ | 629.2 | land vehicles | → 343.094 625.7 |
| ↑ | 631.5 | cultivation and harvesting | → 627.5 |
| ↑ | 632 | plant pathology, biological and chemical control | → 581 668.6 ≈ S.SPEC.34.HA |
| ↑ | 634.8 | viticulture | → 663.2 |
| ↑ | 641 | food, hunting and fishing | → 612.3 613.2 664 |
| ↑ | 658.401 | planning, control | → 658.5 |
| ↑ | 658.5 | production, quality control
| → 658.401 |
| ↑ | 660 | laboratory techniques, biotechnology in general | → 572 610.28 ≈ `59E |
| ↑ | 660.6 | biotechnology | → 615.19 |
| ↑ | 663.2 | oenology | → 634.8 ≈ S.SPEC.28.AS |
| ↑ | 664 | food technology and microbiology | → 344.042 579.563 641 |
| ↑ | 666 | ceramic and analogous technologies | → 620.14 738 |
| ↑ | 668.6 | agricultural chemical substances, pesticides | → 632 |
| ↑ | 668.9 | polymers | → 547.7 620.19 |
| ↑ | 669 | metallurgy | → 546.3 620.16 624.18 671 ≈ `59F |
| ↑ | 671 | metal processing, galvanoplastics | → 669 |
| ↑ | 681 | precision instruments | → 621.3815 |
| ↑ | 681.2 | test and measurement tools, sensors | → 530.8 620.11 |
| ↑ | 690 | building in general | → 624 720 |
| ↑ | 691 | building materials | → 624.18 721.04 |
| ↑ | 693.5 | concrete | → 620.13 |
| ↑ | 693.7 | metals | → 624.182 |
| ↑ | 693.85 | antiseismic and antiexplosion buildings | → 624.176 |
| ↑ | 694 | wooden buildings | → 624.184 |
| ↑ | 696 | internal plants | → 628 720.47 |
| ↑ | 711.4 | municipal-scale planning, cities | → 307 333.337 346.045 629 |
| ↑ | 711.7 | transport facilities | → 363.12 625 |
| ↑ | 712 | landscape architecture | → 635.9 |
| ↑ | 714 | water features in landscape | → 627.1 |
| ↑ | 720 | architecture in general | → 690 |
| ↑ | 720.28 | restoration, architectural drawing | → 690.24 |
| ↑ | 720.284 | architectural drawing | → 604 704.944 745 |
| ↑ | 720.47 | architecture and environment | → 333.7 338.927 621.47 696 |
| ↑ | 721 | building and architectural structures | → 690.1 |
| ↑ | 721.04 | architecture materials | → 691 693 |
| ↑ | 725.3 | buildings for tranport and storage | → 624.2 625 |
| ↑ | 725.5 | health buildings | → 614 |
| ↑ | 729 | design and decoration | → 667 |
| ↑ | 729.28 | lighting | → 621.32 690.18 |
| ↑ | 738 | ceramic arts | → 666 |
| ↑ | 780.061 | music and medicine | → 610 |
| ↑ | 796 | athletic and outdoor sport and games | → 613.71 |
| ↑ | Q.2 | | ≈ 519.8 620 MSC 00A69 pro parte |
| ↑ | R.1 | operations research, programming theory | ≈ 519.7 658.4 MSC 90 |
| ↑ | ZD.0 | | ≈ 620 |
| A.1 | Ophthalmology | ≈ 617.7 |
| ↑ | A11 | AGARD | ≈ 624.17 |
| AC | congressional acts (elect.) | ≈ 621.3 |
| ↑ | ACF | aqueducts and sewers | ≈ 628 |
| ↑ | ACU | acoustics | ≈ 620.2 |
| ↑ | AF1 | reliability | ≈ 363.1 620.11 |
| ↑ | AF2 | reliability of the equipment and electronic systems | ≈ 620.11 621.38 |
| ↑ | AF3 | reliability of electrical systems | ≈ 620.11 621317 |
| ↑ | AF4 | reliability and quality control | ≈ 620.11 658.4 |
| ↑ | AF5 | burn-in | ≈ 620.11 |
| ↑ | AF6 | reliability tests | ≈ 620.11 |
| ↑ | AF7 | congresses (electr. reliability) | ≈ 620.11 621.31 |
| ↑ | AI7 | artificial intelligence 7, robotic | ≈ 006.3 629.8 |
| ↑ | AM1 | agricolture | ≈ 333.7 630 |
| ↑ | AM3 | quarries | ≈ 344 622.2 |
| ↑ | AM4 | landfills | ≈ 628.4 |
| ↑ | AP1 | electrical accumulators | ≈ 621.3824 |
| ↑ | AP2 | electrical devices of manoeuvring and protection | ≈ 621317 |
| ↑ | AP3 | sensors and electric actuators | ≈ 621.3824 |
| ↑ | AP4 | congresses (electrical devices) | ≈ 621.31 |
| ↑ | AR16 | fires | ≈ 628.9 |
| ↑ | AR17 | industrialization | ≈ 658.4 690.2 |
| ↑ | AR18 | construction management and planning | ≈ 658.4 690.2 |
| ↑ | AR24 | security of the building system | ≈ 690.22 |
| ↑ | AR3 | Technical Architecture. | ≈ 690 721 |
| ↑ | AR7 | building | ≈ 690 |
| ↑ | AU1 | industrial automation | ≈ 658.5 |
| ↑ | AU2 | industrial electronics and drives | ≈ 629 |
| ↑ | AU3 | industrial robotics
| ≈ 629 |
| ↑ | AU4 | Instrumentation for the automation | ≈ 658.5 |
| ↑ | AU5 | congresses (Inudstrial automation) | ≈ 629 |
| AV | various applications (electr.) | ≈ 621.3 |
| A_ | aereonautics | ≈ 629 |
| B1 | hydraulics | ≈ 627 |
| ↑ | B11 | italsider | ≈ 624.17 |
| BI | (electronics) | ≈ 621.3 |
| ↑ | BI1 | automation in health care management | ≈ 610.28 |
| ↑ | BI10 | models of biological systems | ≈ 610.15 |
| ↑ | BI11 | clinical decision support system | ≈ 610.15 |
| ↑ | BI12 | biomedical statistics | ≈ 610.72 |
| ↑ | BI13 | biomedical engineering | ≈ 610.28 |
| ↑ | BI14 | congresses (bioengineering) | ≈ 610.28 |
| ↑ | BI2 | biophysics | ≈ 610153 |
| ↑ | BI3 | bioimaging | ≈ 610.28 |
| ↑ | BI4 | physical bioengineering | ≈ 610153 |
| ↑ | BI5 | biomaterials, artificial organs and prostheses | ≈ 610.28 |
| ↑ | BI6 | biomechanics and biomass | ≈ 612.7 |
| ↑ | BI7 | data processing and biomedical signals | ≈ 610.28 |
| ↑ | BI8 | clinical engineering | ≈ 612.7 |
| ↑ | BI9 | rehabilitation engineering | ≈ 612.7 |
| ↑ | BOI | reclamation and irrigation | ≈ 627.5 |
| ↑ | C II | Industrial design | ≈ 693.97 |
| C1 | hydraulics | ≈ 627 |
| ↑ | CDA | water chemistry | ≈ 628 |
| CE | electromechanical constructions | ≈ 621.3 |
| ↑ | CE1 | power stations | ≈ 621.31 |
| ↑ | CE2 | wind power plants | ≈ 621.31 |
| ↑ | CE3 | hydroelectric power stations | ≈ 621.31 |
| ↑ | CE4 | nuclear power plants | ≈ 621.31 |
| ↑ | CE5 | solar power plants | ≈ 621.31 |
| ↑ | CE6 | thermoelectric power plants | ≈ 621.31 |
| ↑ | CH1 | applied chemistry | ≈ 660 |
| CI | electrical communications | ≈ 621319 |
| ↑ | CI1 | aqueducts and sewerage | ≈ 628 |
| ↑ | CI2 | reclamation and irrigation | ≈ 627.5 |
| ↑ | CI3 | hydraulics contructions | ≈ 627 |
| ↑ | CI4 | water management and water resources | ≈ 627 |
| ↑ | CI5 | marine hydraulics | ≈ 627 |
| ↑ | CI7 | hydropower plants | ≈ 627 |
| ↑ | CI9 | congresses (hydraulic buildings) | ≈ 627 |
| ↑ | CN1 | automatic control | ≈ 629 |
| ↑ | CN2 | process control | ≈ 629 |
| ↑ | CN3 | digital controls | ≈ 629 |
| ↑ | CN4 | optimal control | ≈ 629 |
| ↑ | CN5 | adaptive systems | ≈ 629 |
| ↑ | CN6 | congresses | ≈ 629 |
| ↑ | CO1 | constructions and structural elements | ≈ 624.18 |
| ↑ | CO3 | renforced and prestressed concrete constructions and structural elements | ≈ 624183 |
| ↑ | CO4 | prefabricated buildings | ≈ 693.97 |
| ↑ | CO5 | road, railways and airport constructions | ≈ 625 |
| ↑ | CO6 | constructions and elevated roads | ≈ 625 |
| ↑ | CO7 | Construction machinery and organization | ≈ 690 |
| ↑ | CO9 | congresses (constructions) | ≈ 624.18 |
| ↑ | COI | hydraulic constructions | ≈ 627 |
| CS | controls and servomechanisms, system theory | ≈ 629 |
| CT | catalogs (elect.) | ≈ 621.3 |
| ↑ | III, IV, V, VI | | ≈ 690 |
| D1 | hydraulics | ≈ 627 |
| ↑ | D1A | building science | ≈ 624.1 |
| ↑ | D1B | construction technology | ≈ 624.15 |
| ↑ | D1C | dynamics, stability, finite elements | ≈ 620.15 |
| ↑ | D1E | mechanical technologies | ≈ 624.1 |
| ↑ | D1Z | the other lesson texts (struct. mechanics) | ≈ 620 |
| ↑ | D20 | Education and training of the engineer | ≈ 607 |
| ↑ | D22 | indexed and yearbooks (struct. mechanics) | ≈ 624.1 |
| ↑ | D2A | Manuals for the engineering | ≈ 602 |
| ↑ | D2B | structures calculation manuals | ≈ 624.17 |
| ↑ | D2C | reinforced and prestressed concrete calculation manuals | ≈ 624183 |
| ↑ | D2D | steel constructions calculation manuals | ≈ 624182 |
| ↑ | D3E | Manuals of mechanical technologies | ≈ 602 |
| ↑ | D4A | buildings and structural details | ≈ 624.17 |
| ↑ | D4B | reinforced and prestressed concrete constructions | ≈ 624183 |
| ↑ | D4C | steel constructions | ≈ 624182 |
| ↑ | D4D | mixed structures | ≈ 624.17 |
| ↑ | D4E | Prefabricated buildings | ≈ 693.97 |
| ↑ | D4F | constructions and elevated roads | ≈ 625 |
| ↑ | D4G | geotechnics, methods of foundation engineering, tunnels | ≈ 624.15 |
| ↑ | D4H | hydraulic constructions | ≈ 627 |
| ↑ | D4I | constructions for storage, transport and lifting of materials | ≈ 629 |
| ↑ | D4J | road, railways and airport constructions | ≈ 625 |
| ↑ | D4K | analysis of collapses, restoration technique, restoration works, reinforcements | ≈ 624.17 |
| ↑ | D4L | materials and materials technology | ≈ 620.1 |
| ↑ | D4M | technology of bulding items and constructions | ≈ 624.17 |
| ↑ | D4N | Production process technology, quality control | ≈ 658 |
| ↑ | D4O | technical architecture | ≈ 690 |
| ↑ | D4P | Constructions and structural details in masonry | ≈ 691 |
| ↑ | D6A | Construction management and planning | ≈ 692 |
| ↑ | D6B | Industrialization | ≈ 690 |
| D7 | Construction machinery and organization | ≈ 690 |
| DE | electronic devices | ≈ 621.38 |
| ↑ | I, II, III, IV, V, | traffic and transport | ≈ 629 |
| ↑ | E5F | structural mechanics | ≈ 624.1 |
| ↑ | ECO | hydraulics | ≈ 627 |
| ↑ | EE1 | planning of energy production | ≈ 621.31 |
| ↑ | EE3 | energy pricing | ≈ 621.31 |
| ↑ | EE4 | congresses (el. energy) | ≈ 621.31 |
| EG | general electronics | ≈ 621.38 |
| ↑ | EL1 | electronical CAD | ≈ 621.3815 |
| ↑ | EL10 | power electronics | ≈ 621.38 |
| ↑ | EL11 | general electronics | ≈ 621.38 |
| ↑ | EL12 | industrial electronics | ≈ 621.38 |
| ↑ | EL13 | numerical electronics | ≈ 621.38 |
| ↑ | EL14 | microelectronics | ≈ 621.3817 |
| ↑ | EL15 | neural grids | ≈ 621.38 |
| ↑ | EL16 | electronic technologies | ≈ 621.38 |
| ↑ | EL17 | VLSI | ≈ 621.38 |
| ↑ | EL18 | congresses (circuit el.) | ≈ 621.38 |
| ↑ | EL2 | analog circuits | ≈ 621.3815 |
| ↑ | EL3 | digital circuits | ≈ 621.3815 |
| ↑ | EL4 | telecommunication circuits | ≈ 621.3815 |
| ↑ | EL5 | semiconductor devices | ≈ 621.3815 |
| ↑ | EL6 | electronic circuits and devices | ≈ 621.3815 |
| ↑ | EL7 | power electronic devices | ≈ 621.3815 |
| ↑ | EL8 | organic electronics | ≈ 621.38 |
| ↑ | EL9 | civil electronics | ≈ 621.38 |
| ↑ | EO6 | business organization | ≈ 658 |
| EP | power electronics | ≈ 621.38 |
| EQ | quantum electronics | ≈ 621.38 |
| ET | general electrical engineering | ≈ 621.31 |
| ↑ | ET1 | electrical CAD | ≈ 621.31 |
| ↑ | ET10 | plasmas | ≈ 621.31 530.44 |
| ↑ | ET11 | grid theory | ≈ 621319 |
| ↑ | ET12 | electrical grid theory | ≈ 621319 |
| ↑ | ET13 | congresses (electronics) | ≈ 621.31 |
| ↑ | ET2 | electric and magnetic fields | ≈ 621.31 |
| ↑ | ET3 | linear and non-linear electric circuits | ≈ 621.31 |
| ↑ | ET4 | electromagnetic compatibility for industrial engineering | ≈ 621.31 |
| ↑ | ET5 | general electrical engineering | ≈ 621.31 |
| ↑ | ET7 | numerical methods for electrical engineering | ≈ 519.4 621.3 |
| ↑ | ET8 | design methods for electromechanical components | ≈ 621.31 |
| ↑ | ET9 | modeling of electromechanical systems | ≈ 621.31 |
| ↑ | FAS | seepage and groundwater | ≈ 627 |
| ↑ | FT2 | technical physics | ≈ 621 |
| ↑ | FT3 | congresses (technic physics) | ≈ 621 |
| ↑ | FTE | technical physics | ≈ 621 |
| ↑ | G14 | congresses (geotechnical) | ≈ 624151 |
| GA | guides, anniversaries and upgrade courses (elect.) | ≈ 621.3 |
| ↑ | GAR | water management | ≈ 627 |
| ↑ | GEO | geotechnical | ≈ 624151 |
| ↑ | GI1 | tunnels | ≈ 624151 |
| ↑ | GI2 | geotechnical | ≈ 624151 |
| ↑ | GI3 | methods of foundation engineering | ≈ 624.15 |
| ↑ | ID2 | agricultural hydraulics | ≈ 627.5 |
| ↑ | ID3 | general hydraulics | ≈ 627 |
| ↑ | ID5 | hydraulic measurements | ≈ 627 |
| ↑ | ID6 | computational methods for process simulation | ≈ 627 |
| ↑ | ID7 | congresses (hydraulics) | ≈ 627 |
| ↑ | IE1 | automation of electrical power systems | ≈ 621319 |
| ↑ | IE10 | safety in electrical power systems | ≈ 621319 |
| ↑ | IE11 | electrical power systems | ≈ 621319 |
| ↑ | IE12 | congresses (electric power systems) | ≈ 621319 |
| ↑ | IE2 | economy and operation of electrical systems | ≈ 621319 |
| ↑ | IE3 | illuminating engineering | ≈ 621.32 |
| ↑ | IE4 | Electrical installations on board | ≈ 621319 |
| ↑ | IE5 | industrial, civil and commercial electrical power systems | ≈ 621319 |
| ↑ | IE6 | production equipment | ≈ 621319 |
| ↑ | IE7 | track-side assembly | ≈ 621319 |
| ↑ | IE8 | transmission and distribution equipment | ≈ 621319 |
| ↑ | IE9 | Operating equipment | ≈ 621319 |
| ↑ | IMI | hydroelectric installations | ≈ 627 |
| ↑ | IN1 | water chemistry | ≈ 628 |
| ↑ | IN3 | water technology and sanitary engineering | ≈ 628 |
| ↑ | IN4 | congresses (sanitary engineering) | ≈ 628 |
| IP | Production plants | ≈ 621.31 |
| ↑ | IS1 | Seismic structures and seismic engineering | ≈ 624176 |
| ↑ | IS10 | Congresses (Engineering of structures) | ≈ 624.17 |
| ↑ | IS2 | Steel stuctures | ≈ 624182 |
| ↑ | IS3 | aluminium structures | ≈ 624182 |
| ↑ | IS4 | Facilities in CA and CAP | ≈ 624.17 |
| ↑ | IS5 | wooden structures | ≈ 624184 |
| ↑ | IS6 | Masonry structure | ≈ 624183 |
| ↑ | IS7 | nuclear facilities | ≈ 624.17 |
| ↑ | IS8 | Structural engineering | ≈ 624.15 |
| ↑ | IS9 | Theory of structures | ≈ 624.17 |
| IT | Electricity distribution plants | ≈ 621319 |
| ↑ | IT1 | Packaging plants | ≈ 697 |
| ↑ | IT2 | Heating systems | ≈ 697 |
| ↑ | IT3 | Plumbing | ≈ 696 |
| ↑ | IT4 | Technical installations | ≈ 696 |
| ↑ | IT5 | Congresses (Technical installations) | ≈ 696 |
| LA | Laser | ≈ 621366 |
| LG | Electronics, information technology, electrical engineering | ≈ 621.31 |
| MA | Materials for the electronics | ≈ 621.38 |
| ↑ | MAN | Manuals (Hydraulics) | ≈ 627 |
| ↑ | MC1 | hydraulic machines | ≈ 621.8 |
| ↑ | MC2 | thermal machines | ≈ 621.8 |
| ↑ | MC3 | Congresses (Machines) | ≈ 621.8 |
| ME | Electrical machines | ≈ 621.3 |
| ↑ | ME1 | electric drives | ≈ 621.3 |
| ↑ | ME2 | Drives for electric traction | ≈ 621.3 |
| ↑ | ME3 | Control and regulation of electrical machines | ≈ 621.3 |
| ↑ | ME4 | Electrical machines | ≈ 621.3 |
| ↑ | ME5 | Special electric machines | ≈ 621.3 |
| ↑ | ME6 | Small electric machines | ≈ 621.3 |
| ↑ | ME7 | Congresses (Electrical machines and drives) | ≈ 621.3 |
| ↑ | MECC.APPL.MACC | | ≈ 624.17 |
| MI | Models and identification | ≈ 621.3 |
| ↑ | MI1 | Theory of approximation and errors | ≈ 620 |
| ↑ | MI2 | Measurement theory | ≈ 620 |
| ↑ | MI3 | Theory and methods of mechanical measurements | ≈ 620 |
| ↑ | MI4 | Congresses (Measures) | ≈ 620 |
| ↑ | MID | hydraulic machine | ≈ 627 |
| MN | Manuals (Elettr.) | ≈ 621.38 |
| ↑ | MN10 | Manuals for the calculation of structures | ≈ 624.17 |
| ↑ | MN11 | Manuals for the calculation of steelworks structures | ≈ 624182 |
| ↑ | MN12 | Manuals for the calculation of structures in c.a. and c.a.p. | ≈ 624182 |
| ↑ | MN13 | Manuals for the electronics | ≈ 621.38 |
| ↑ | MN14 | Manuals for engineering | ≈ 620 |
| ↑ | MN15 | Manuals for experimental tests | ≈ 624 |
| ↑ | MN16 | Various manuals | ≈ 620 |
| ↑ | MN4 | Hydraulic manuals | ≈ 627 |
| ↑ | MN5 | Electrical machinery manuals | ≈ 621.8 |
| ↑ | MN8 | Software manuals and graphical applications | ≈ 6 |
| ↑ | MN9 | Manuals of mechanical technologies | ≈ 620.1 |
| MO | Microwave | ≈ 621.3813 |
| ↑ | MO2 | Instrumentation and measurements | ≈ 620 |
| ↑ | MO5 | Sensors, transducers, actuators, detectors | ≈ 621.3 |
| MP | Microprocessor | ≈ 621.3817 |
| ↑ | MP1 | Mechanics of Machines | ≈ 621.8 |
| ↑ | MP2 | Kinematics and dynamics | ≈ 621.8 |
| ↑ | MP3 | Machinery and machinery components | ≈ 621.8 |
| ↑ | MP4 | Vibes | ≈ 620 |
| ↑ | MP5 | tribology | ≈ 621.8 |
| ↑ | MP6 | system dynamics | ≈ 620.1 |
| ↑ | MR1 | Dynamics and vibrations | ≈ 620.1 |
| ↑ | MR10 | construction science | ≈ 624.15 |
| ↑ | MR11 | Structural safety and action modelling | ≈ 624.17 |
| ↑ | MR12 | stable | ≈ 624.17 |
| ↑ | MR13 | Viscosity, creep, fluage, fatigue, local effects | ≈ 624.17 |
| ↑ | MR14 | Congresses (Mechanics of structures) | ≈ 624.17 |
| ↑ | MR2 | Elasticity | ≈ 620.1 |
| ↑ | MR3 | Flat and curved plates | ≈ 620.1 |
| ↑ | MR5 | Soil and rock mechanics | ≈ 624151 |
| ↑ | MR6 | Continuous mechanics and strength of materials | ≈ 620.1 |
| ↑ | MR7 | fracture mechanics | ≈ 624.17 |
| ↑ | MR8 | Plasticity and calculation at break | ≈ 624.17 |
| ↑ | MR9 | Optimum design | ≈ 624.17 |
| MS | Electrical measurement | ≈ 621.3 |
| ↑ | MS1 | Electrical measuremenT | ≈ 621.3 |
| ↑ | MS2 | Electronic measures | ≈ 621.3 |
| ↑ | MT1 | Building materials | ≈ 620.1 |
| ↑ | MT2 | Dielectric materials | ≈ 620.1 |
| ↑ | MT3 | Electronic materials and technologies | ≈ 620.1 |
| ↑ | MT4 | Materials for electrical engineering | ≈ 620.1 |
| ↑ | MT5 | Materials for optoelectronics | ≈ 620.1 |
| ↑ | MT6 | magnetic materials | ≈ 620.1 |
| ↑ | MT7 | semiconductor materials | ≈ 620.1 |
| ↑ | MT8 | Material technology | ≈ 620.1 |
| ↑ | MT9 | Congresses (Materials) | ≈ 620.1 |
| OE | Optoeletronics | ≈ 621382 |
| ↑ | OE10 | Radio propagation | ≈ 621382 |
| ↑ | OE2 | Antennas | ≈ 621382 |
| ↑ | OE3 | Industrial and medical applications of electromagnetic waves | ≈ 621.38 |
| ↑ | OE5 | Electromagnetic compatibility | ≈ 621.38 |
| ↑ | OE7 | Numerical and CAD methods in electromagnetism | ≈ 621.38 |
| ↑ | OE8 | Microwaves, millimeter and submillimetre | ≈ 621.3813 |
| ↑ | OE9 | Electromagnetic waves and plasmas | ≈ 621.38 530.44 |
| ↑ | OP1 | Optical fibres, integrated optics | ≈ 621382 |
| ↑ | OP2 | photodetectors | ≈ 621382 |
| ↑ | OP3 | Infrared (components and systems for) | ≈ 621382 |
| ↑ | OP4 | Fiber optic sensors | ≈ 621382 |
| ↑ | OP5 | Sources for optoelectronics | ≈ 621382 |
| ↑ | OP6 | Optoelectronic technologies | ≈ 621382 |
| ↑ | OP7 | Congresses (Optoelectronics) | ≈ 621382 |
| OT | Optical | ≈ 621.36 |
| ↑ | OT1 | Industrial applications of Fourier | ≈ 621.36 |
| ↑ | OT10 | Spectroscopy | ≈ 621.36 |
| ↑ | OT11 | Congresses (Optics) | ≈ 621.36 |
| ↑ | OT2 | Quantum electronics | ≈ 621.36 |
| ↑ | OT3 | Laser in chemistry and biology, physiological optics | ≈ 621366 |
| ↑ | OT4 | Holographic and optics of Fourier | ≈ 621.36 |
| ↑ | OT5 | General optics, optical components and instruments | ≈ 621.36 |
| ↑ | OT6 | Non linear optics | ≈ 621.36 |
| ↑ | OT7 | Quantum Optics | ≈ 621.36 |
| ↑ | OT8 | Light propagation and diffusion | ≈ 621.36 |
| ↑ | OT9 | Laser sources, laser technologies, ultra-fast phenomena | ≈ 621366 |
| ↑ | Otorino610 | Medicine | ≈ 610 |
| ↑ | Otorino610.3 | medical dictionaries | ≈ 610.3 |
| ↑ | Otorino611 | human anatomy | ≈ 611 |
| ↑ | Otorino611.018 | cytology and human histology | ≈ 611018 |
| ↑ | Otorino611.85 | ear anatomy | ≈ 611.85 |
| ↑ | Otorino611.91 | head anatomy | ≈ 611.91 |
| ↑ | Otorino612 | human physiology | ≈ 612 |
| ↑ | Otorino612.2 | pneumology | ≈ 612.2 |
| ↑ | Otorino612.78 | voice and articulated language | ≈ 612.78 |
| ↑ | Otorino612.846 | eye movement | ≈ 612846 |
| ↑ | Otorino612.85 | sensory functions of the ear | ≈ 612.85 |
| ↑ | Otorino612.858 | inner ear | ≈ 612858 |
| ↑ | Otorino616.07 | pathology in otolaryngology | ≈ 616.07 |
| ↑ | Otorino616.202 | respiratory allergy | ≈ 616.202 |
| ↑ | Otorino616.21 | rhinology | ≈ 616.21 |
| ↑ | Otorino616.212 | illnesses of paranasal sinuses | ≈ 616.212 |
| ↑ | Otorino616.22 | laryngology | ≈ 616.22 |
| ↑ | Otorino616.3 | digestive system diseases | ≈ 616.3 |
| ↑ | Otorino616.31 | mouth and throat diseases | ≈ 616.31 |
| ↑ | Otorino616.5 | dermatology | ≈ 616.5 |
| ↑ | Otorino616.8 | nervous system disease | ≈ 616.8 |
| ↑ | Otorino616.84 | symptoms of neurological diseases | ≈ 616.84 |
| ↑ | Otorino616.841 | dizziness and vertigo | ≈ 616.841 |
| ↑ | Otorino616.855 | speech and language disorders | ≈ 616.855 |
| ↑ | Otorino616.97 | immune system diseases | ≈ 616.97 |
| ↑ | Otorino616.99 | cancers and contagious diseases | ≈ 616.99 |
| ↑ | Otorino616.9941 | cardiovascular organs cancer | ≈ 616.9941 |
| ↑ | Otorino616.99422 | laryngeal cancers | ≈ 616.99422 |
| ↑ | Otorino617 | surgery, prosthesis | ≈ 617 |
| ↑ | Otorino617.05 | surgical instruments and techniques | ≈ 617.05 |
| ↑ | Otorino617.51 | head surgery | ≈ 617.51 |
| ↑ | Otorino617.52 | facial surgery | ≈ 617.52 |
| ↑ | Otorino617.522 | surgery of the oral area | ≈ 617.522 |
| ↑ | Otorino617.523 | nose surgery | ≈ 617.523 |
| ↑ | Otorino617.53 | neck surgery | ≈ 617.53 |
| ↑ | Otorino617.533 | larynx and trachea surgery | ≈ 617.533 |
| ↑ | Otorino617.7 | eye, ophthalmology | ≈ 617.7 |
| ↑ | Otorino617.8 | deafness | ≈ 617.8 |
| ↑ | Otorino617.8059 | ears diseases | ≈ 617.8059 |
| ↑ | Otorino617.8075 | audiometry | ≈ 617.8075 |
| ↑ | Otorino617.84 | diseases of the middle ears | ≈ 617.84 |
| ↑ | Otorino617.88 | inner ears pathologies | ≈ 617.88 |
| ↑ | Otorino617.882 | pathologies of the ears' labyrinth | ≈ 617.882 |
| ↑ | Otorino617.952 | plastic surgery | ≈ 617.952 |
| ↑ | Otorino618.922 | pediatric diseases of the tract respiratory | ≈ 618922 |
| ↑ | PC10 | Congresses (Computers) | ≈ 6 |
| ↑ | PC6 | information system | ≈ 6 |
| ↑ | PC8 | Systems for automatic design | ≈ 6 |
| ↑ | PC9 | Information structures | ≈ 6 |
| ↑ | PS1 | Experimental analysis of voltages | ≈ 624.17 |
| ↑ | PS2 | Test machines | ≈ 620 |
| ↑ | PS3 | Building materials | ≈ 620.1 |
| ↑ | PS4 | Testing of structures | ≈ 624.17 |
| ↑ | PS5 | Congresses (Experimental tests) | ≈ 620 |
| ↑ | R +n | building recovery | ≈ 690.24 |
| ↑ | R1B | deformable continues mechanics, materials resistance | ≈ 624.17 |
| ↑ | R1C | soils and rocks mechanics | ≈ 624.151 |
| ↑ | R1E | Elasticity | ≈ 624.17 |
| ↑ | R1F | Plasticity; calculation at break | ≈ 624.17 |
| ↑ | R1G | Fracture mechanics | ≈ 624.17 |
| ↑ | R1H | Viscosity | ≈ 624.17 |
| ↑ | R1I | Structural mechanics | ≈ 624.17 |
| ↑ | R1J | Dynamics and vibrations | ≈ 624.17 |
| ↑ | R1K | Stability | ≈ 624.17 |
| ↑ | R1L | Optimum design | ≈ 624.17 |
| ↑ | R1M | Flat and curved plates | ≈ 624.17 |
| ↑ | R2A | Theory of structures | ≈ 624.17 |
| ↑ | R2B | Facilities in CA and CAP | ≈ 624183 |
| ↑ | R2C | Steel structures | ≈ 624182 |
| ↑ | R2D | Mixed steel and concrete structures | ≈ 624182 |
| ↑ | R2E | Aluminium structures | ≈ 624182 |
| ↑ | R2F | masonry structures. | ≈ 624183 |
| ↑ | R2G | Wooden structures | ≈ 624184 |
| ↑ | R2H | nuclear facilities | ≈ 624.17 |
| ↑ | R2I | Seismic structures | ≈ 624176 |
| ↑ | R3D | Overall reliability | ≈ 620 |
| ↑ | R3E | Loads and their effects | ≈ 620 |
| ↑ | R3G | Impact problems | ≈ 620 |
| ↑ | R4A | Numerical methods | ≈ 624.17 519.4 |
| ↑ | R4B | Finite difference | ≈ 624.17 519.4 |
| ↑ | R4C | Finite element | ≈ 624.17 519.4 |
| ↑ | R4D | Mathematical Programming | ≈ 624.17 519.4 |
| ↑ | R4E | Matrix methods | ≈ 624.17 519.4 |
| ↑ | R4F | Calculation of structures | ≈ 624.17 |
| ↑ | R4G | Contour elements | ≈ 624.17 |
| RA | Radio engineering | ≈ 621382 |
| RD | Radar | ≈ 621382 |
| ↑ | RID | hydraulic resources | ≈ 627 |
| RL | Logic networks | ≈ 621.38 |
| ↑ | S +n | traffic and transports | ≈ 629 |
| ↑ | S.FLORE.A | roses, gardening, history of botany | ≈ 635 |
| ↑ | S.FLORE.B | flowers and ornamental plants | ≈ 635.9 |
| ↑ | S.SPEC.21.AD | plant microbiology | ≈ 632.32 |
| ↑ | S.SPEC.21.AE | agriculture, agronomy, forestry, timbers | ≈ 630 |
| ↑ | S.SPEC.22.AF | phytotherapy, pharmaceutical botany | ≈ 615321 |
| ↑ | S.SPEC.23.AF | bacterial diseases, tropical diseases | ≈ 616.9 |
| ↑ | S.SPEC.23.AG | tobacco | ≈ 633.7 |
| ↑ | S.SPEC.25.AI | cocoa, coffee, tea, spices | ≈ 633.7 |
| ↑ | S.SPEC.27.AO | fruit | ≈ 634 |
| ↑ | S.SPEC.27.AP | pesticides, pest control | ≈ 632.9 |
| ↑ | S.SPEC.28.AS | oenology,viticulture | ≈ 663.2 |
| ↑ | S.SPEC.28.AT | grain growth | ≈ 633.1 |
| ↑ | S.SPEC.32.BF | animal husbandry, breeding | ≈ 636 |
| ↑ | S.SPEC.33.BL | medicine | ≈ 610 |
| ↑ | S.SPEC.34.HA | plant pathology, mycopathology | ≈ 632 |
| ↑ | S.SPEC.37.CE | antibiotics | ≈ 615329 |
| ↑ | S.SPEC.37.CF | frauds, pollution, agricultural technology and industry | ≈ 628.5 |
| ↑ | S.SPEC.40.EB | soil science | ≈ 631.4 |
| ↑ | S.SPEC.42.GA | techniques | ≈ 6 |
| S1 | experimental section and material tests | ≈ 624.17 |
| S2 | experimentation on structures | ≈ 624.17 |
| S3 | test machines | ≈ 620 |
| S4 | building materials | ≈ 620.1 |
| S5 | manuals and congresses RILEM | ≈ 620 |
| ↑ | T +n | topography | ≈ 623 |
| ↑ | TA1 | high tension generators | ≈ 621.31 |
| ↑ | TA2 | methods of measures in hight tension | ≈ 621.31 |
| ↑ | TA3 | congresses (high tension technique | ≈ 621.31 |
| ↑ | TE1 | telecommunications satellites | ≈ 621.382 |
| ↑ | TE10 | congresses (telecommunications) | ≈ 621.382 |
| ↑ | TE2 | radio communication systems | ≈ 621.382 |
| ↑ | TE3 | radar systems and radio aids | ≈ 621.382 |
| ↑ | TE4 | telecommunications networks, commutation | ≈ 621.382 |
| ↑ | TE5 | optical telecommunications | ≈ 621.382 |
| ↑ | TE6 | signals and noise theory | ≈ 621.39 |
| ↑ | TE7 | information theory, codes, signals processing | ≈ 621.39 |
| ↑ | TE8 | general books of electrical communications | ≈ 621.3 |
| ↑ | TE9 | transducers for telecommunications | ≈ 621.382 |
| ↑ | TEA | water technology | ≈ 627 |
| ↑ | TER | thermodynamics | ≈ 621.4 |
| ↑ | TL-E | thesis (electr.) | ≈ 621.3 |
| ↑ | TL-ID | thesis of hydraulics | ≈ 627 |
| ↑ | TL-IE | thesis (electr.) | ≈ 621.3 |
| ↑ | TL-IS | thesis (electr.) | ≈ 621.3 |
| ↑ | TL-MS | structural mechanics | ≈ 624.17 |
| ↑ | TM1 | quality control | ≈ 658.4 |
| ↑ | TM2 | production processes technology | ≈ 658.5 |
| ↑ | TM3 | mechanical technologies | ≈ 620.1 |
| ↑ | TM4 | congresses (mechanical technology) | ≈ 620.1 |
| TR | electrical traction | ≈ 629 |
| ↑ | TT1 | traffic control | ≈ 629 |
| ↑ | TT10 | modelling in transports | ≈ 629 |
| ↑ | TT11 | car parks | ≈ 629 |
| ↑ | TT12 | transports planning | ≈ 629 |
| ↑ | TT13 | bridges | ≈ 624.2 |
| ↑ | TT14 | productivity in transports | ≈ 629 |
| ↑ | TT15 | safety in transports | ≈ 629 |
| ↑ | TT16 | statistics in transports | ≈ 629 |
| ↑ | TT17 | streets | ≈ 625 |
| ↑ | TT18 | traffic and circulation | ≈ 629 |
| ↑ | TT19 | urban traffic | ≈ 629 |
| ↑ | TT2 | transports costs | ≈ 629 |
| ↑ | TT20 | tramline | ≈ 629 |
| ↑ | TT21 | transports | ≈ 629 |
| ↑ | TT22 | air transports | ≈ 629 |
| ↑ | TT23 | railway transports | ≈ 629 |
| ↑ | TT24 | cableway transports | ≈ 629 |
| ↑ | TT25 | industrial transports | ≈ 629 |
| ↑ | TT26 | sea transports | ≈ 629 |
| ↑ | TT27 | road transports | ≈ 629 |
| ↑ | TT28 | urban and suburban transports | ≈ 629 |
| ↑ | TT29 | electrically and thermal powered | ≈ 629 |
| ↑ | TT3 | transports economics | ≈ 629 |
| ↑ | TT30 | congresses (transports) | ≈ 629 |
| ↑ | TT4 | railways | ≈ 625 |
| ↑ | TT5 | cableway | ≈ 629 |
| ↑ | TT6 | environmental engineering | ≈ 629 |
| ↑ | TT7 | transports engineering | ≈ 629 |
| ↑ | TT8 | undergrounds | ≈ 629 |
| ↑ | TT9 | mobility | ≈ 629 |
| ↑ | TUI | hydraulics | ≈ 627 |
| VA | electronics, computer science, electrotechnics | ≈ 621.3 |
| ↑ | VA1 | yearbooks (various) | ≈ 621.3 |
| ↑ | VA10 | various texts | ≈ 621.3 |
| ↑ | VA3 | various | ≈ 621.3 |
| ↑ | VAR | various (hydraulics) | ≈ 627 |
| VL | VLSI (large-scale integration) | ≈ 621.3815 |
| ↑ | 20A | applied geology. Treatises and handbooks | ≈ 624.1 |
| ↑ | 20B | applied geology. Geology of buildings and geology of linear works | ≈ 624.15 |
| ↑ | 20F | applied geology. Local studies | ≈ 624.15 |
| ↑ | 20G | applied geology. Geopedology | ≈ 624.151 |
| ↑ | 22A | geotechnic and technical geology. Treatises and handbooks | ≈ 624.151 |
| ↑ | 22B | geotechnic and technical geology. Soil mechanics | ≈ 624.151 |
| ↑ | 22C | geotechnic ancd technical geology. Mechanics of the rocks | ≈ 624.151 |
| ↑ | 23F | mining geology. Quarries | ≈ 622.2 |
| ↑ | 31H | technical geology | ≈ 624.15 |
| ↑ | 32H | ceramics | ≈ 620.14 553.6 |
| ↑ | 59E | industrial chemistry | ≈ 660 |
| ↑ | 59F | metallurgy | ≈ 669 |
| ↑ | 8Bmin | mining art | ≈ 622 |
| ↑ | 8Cmin | special deposits of individual minerals | ≈ 622.3 |
| ↑ | 8Fmin | special works about deposits | ≈ 622 |
