.FS File Extension

File Type 1

Visual F# Source File

Developer Microsoft
3.9  |  33 Votes
Category Developer Files
Format Text

What is an FS file?

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.

More Information

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

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Programs that open or reference FS files

Updated July 7, 2010
File Type 2

Mac OS X File System Plug-in

Developer Apple
2.8  |  9 Votes
Category Plugin Files
Format N/A

What is an FS file?

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.

More Information

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.

Programs that open or reference FS files

Included with OS
Updated January 13, 2015
File Type 3

FlexiSIGN Document

Developer SA International
2.4  |  9 Votes
Category Vector Image Files
Format Binary

What is an FS file?

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.

More Information

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

Programs that open FS files

Updated June 22, 2010

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