.FS File Extension

Source code file written in Microsoft's F# (pronounced "F Sharp") programming language, which is a variant of the ML language; can be written using the Visual F# component of Microsoft Visual Studio 2010; used for compiling F# code into .DLL or .EXE program executables.

F# is designed for use with Microsoft's .NET library and tools. It was formally introduced with Microsoft's 2010 release of Visual Studio.

Image file created by one of SAi's Flexi FAMILY software products; stores the text, graphics, dimensions, and plotting properties for a sign; used for printing banners and other signs on large-scale plotters and cutters; can be exported as a .PDF or .EPS file using the software.

Flexi FAMILY products include FlexiSIGN, FlexiSIGN-PRO, FlexiEXPERT, FlexiPRINT & CUT, FlexiLETTER, FlexiDESIGNER, FlexiENGRAVE, and FlexiENGRAVE-PRO.

Plugin that enables support for a certain file system in Mac OS X; allows the Mac operating system to recognize hard drives and other media formatted with different file systems.

Examples of file system plugins include "hfs.fs," "msdos.fs," and "cd9660.fs." Each FS file is saved as a Mac OS X bundle, but is defined as a plugin. They are stored by default in the "/System/Library/Filesystems" directory.

NOTE: FS files should not be opened manually since they are system files.