File Extensions – The Source for File Extensions Information
http://www.file-extensions.org/

File extensions are usually three or four letter codes on the end of file names that tell operating system (MS-DOS, Windows 95/98/ME/2000,Windows XP, Windows Vista, Unix, Linux, MAC OS etc.) what kind of file they are dealing with (which application can automaticaly open the file or which program can edit the file etc.)They have researched and collected a very large list of the file extensions with detailed explanations of each file type and the way they are used today. They have also tried to include a few of the common software programs that use or is associated with each of these file extension types. If you come across a file in your computer with an unknown file extension, you can look up the information about desired file extension and its file associations using the File-extensions.org website. This has been added to Reference Resources Subject Tracer™ Information Blog. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog. This has been added to Script Resources Subject Tracer™ Information Blog. This has been added to World Wide Web Reference Subject Tracer™ Information Blog.