.fac - FACE graphics file. ( file extension )

.fbm - Fuzzy Bitmap format. Native file format of the Fuzzy pixmap image manipulation and conversion toolkit

.fits - Flexible Image Transport System file format. Originally defined by the International Astronomical Union (IAU) to store and interchange astronomical data between scientific organizations. ( file extension )

.fla - Macromedia. flash movie authorizing file.

.flc .fli .flx - Flic(x) movie animation file format. Very quick format that uses existing parts of previous frames to allow for faster transition between frames.

.flx - Flex file format. File used with Flexmail software to process data in form requests.

.fmp - AutoCAD Font Map (Autodesk, Inc.)

.fmt - 1-2-3 Lotus; or dBASE IV Format File; or Oracle Text Form Format.

.fn_ - CAD file format.

.fpx - New Kodak format for viewing and manipulating image files. Compare .pcd files. ( file extension )

.frm - Visual Basic Form. ( file extension ).

.fxp - FoxPro Compiled Source (Microsoft).