| Terms for subject Abbreviation (890990 entries) |
| Filii Fabricaverunt (Latin: His/Her Sons Built, epigraphy) | FF | Alex Lilo |
| FASTER | filing and source data entry techniques for easier retrieval | |
| FS | filing system | |
| Filio Mater (Latin: Mother to Her Son, epigraphy) | FM | Alex Lilo |
| Filio Morenti (Latin: To His/Her Dying Son, epigraphy) | FM | Alex Lilo |
| Filipino American | Fil-Am | Artjaazz |
| Filius | F. | |
| f | filius | |
| fil | filius | |
| Filius Matri (Latin: Son to His Mother, epigraphy) | FM | Alex Lilo |
| fill | filler | |
| fill | filling | |
| FI | fill | |
| F | fill | |
| F&B | fill and bleed | |
| FCVLV | fill and check valve | |
| F&D | fill and drain | |
| FDVLV | fill and drain valve | |
| F/D VLV | fill and drain valve | |
| FATC | fill automatic temperature controller |