| ↑ | F +n | engineering of land |   ≈ 711 |   |
| ↑ | F I | Dictionaries (Eng. territory) | ≈ 711 | |
| ↑ | F VI | Geographical search in Italy? | ≈ 910 | |
| ↑ | F VII | Congresses (Eng. territory) | ≈ 711 | |
| ↑ | F VIII | Topography | ≈ 526 | |
| ↑ | F.8b | computer science essays and guides | | |
| ↑ | F.@1 | Bibliographic introductions, bibliographies, library catalogs | | |
| ↑ | F.@2 | Encyclopaedias and encyclopedic dictionaries | | |
| ↑ | F.@3 | biographies | | |
| ↑ | F.@4 | Dictionary and vocabulary | | |
| ↑ | F.@5 | conference proceedings | | |
| ↑ | F.@6 | exhibition catalogues | | |
| ↑ | F.@7 | Studies in honour | | |
| ↑ | F.@8 | Essays | | |
| ↑ | F.@9 | Handbook | | |
| ↑ | F.Arch.1 | Bibliographic introductions, bibliographies, library catalogues | | |
| ↑ | F.Arch.2 | Encyclopaedias and encyclopedic dictionaries | | |
| ↑ | F.Arch.3 | Biographies | | |
| ↑ | F.Arch.4 | Dictionary, vocabulary | | |
| ↑ | F.Arch.5 | conference proceedings | | |
| ↑ | F.Arch.6 | exhibition catalogues | | |
| ↑ | F.Arch.7 | Manuals and legislation | | |
| ↑ | F.Arch.8 | Essays in a necklace | | |
| ↑ | F.Arch.9 | Essays | | |
| ↑ | F.Bibl.1 | Bibliographic introductions, bibliographies, library catalogues | | |
| ↑ | F.Bibl.2 | Encyclopaedias and encyclopedic dictionaries | | |
| ↑ | F.Bibl.3 | Biographies | | |
| ↑ | F.Bibl.4 | Dictionary, vocabulary | | |
| ↑ | F.Bibl.5 | conference proceedings | | |
| ↑ | F.Bibl.6 | exhibition catalogues | | |
| ↑ | F.Bibl.7 | Manuals, standards, cataloguing rules | | |
| ↑ | F.Bibl.8 | Essays in a necklace | | |
| ↑ | F.Bibl.9 | Essays | | |
| ↑ | F.Cod.1 | Bibliographic introductions, bibliographies, library catalogues | | |
| ↑ | F.Cod.2 | Encyclopaedias and encyclopedic dictionaries | | |
| ↑ | F.Cod.3 | Biographies | → | |
| ↑ | F.Cod.4 | Dictionary, vocabulary | | |
| ↑ | F.Cod.4a | Dictionaries, repertoires of watermarks | | |
| ↑ | F.Cod.5 | conference proceedings | | |
| ↑ | F.Cod.6 | exhibition catalogues | | |
| ↑ | F.Cod.7 | handbook | | |
| ↑ | F.Cod.8 | Essays | | |
| ↑ | FAS | seepage and groundwater | ≈ 627 | |
| | FG | General physics | |
| ↑ | FG1 | Statistical physics and thermodynamics | ≈ 530.13 536 | |
| ↑ | FG2 | Manuals and exercises for physics courses 1 and 2 | ≈ 530 | |
| ↑ | FG3 | Classical mechanics and relativity | ≈ 530.11 531 | |
| ↑ | FG4 | Quantum mechanics | ≈ 530.12 | |
| ↑ | FG5 | Congresses (Physics) | ≈ 530 | |
| ↑ | FGE | General physics | ≈ 530 | |
| | FS | statistical physics | |
| ↑ | FT1 | Sound | ≈ 534 | |
| ↑ | FT2 | technical physics | ≈ 621 | |
| ↑ | FT3 | congresses (technic physics) | ≈ 621 | |
| ↑ | FTE | technical physics | ≈ 621 | |
