| Abbreviation | Definition |
|---|---|
| F01 | Fax (perfectfax) |
| F06 | Dos screen text font - height 6 pixels (fntcol13.zip) |
| F07 | Dos screen text font - height 7 pixels (fntcol13.zip) |
| F08 | Dos screen text font - height 8 pixels (fntcol13.zip) |
| F09 | Dos screen text font - height 9 pixels (fntcol13.zip) |
| F10 | Dos screen text font - height 10 pixels (fntcol13.zip) |
| F11 | Dos screen text font - height 11 pixels (fntcol13.zip) |
| F12 | Dos screen text font - height 12 pixels (fntcol13.zip) |
| F13 | Dos screen text font - height 13 pixels (fntcol13.zip) |
| F13 | File 13 (Trash) |
| F14 | Dos screen text font - height 14 pixels (fntcol13.zip) |
| F16 | Dos screen text font - height 16 pixels (fntcol13.zip) |
| F2R | Farandole Linear Module Music format |
| F3R | Farandole blocked linear module format - Music |
| F77 | Fortran 77 language source code file |
| F90 | Fortran 90 language source code file (free form) |
| F96 | Fax (Frecom FAX96) |
| FAC | Bitmap graphics (UNIX Faceserver image file) (Usenix FACE) |
| FACE | Bitmap graphics (UNIX Faceserver image file) (Usenix FACE) |
| FAL | Bitmap graphics (image header information) (Q0 format) |