I finally might be able to help someone..Here is some EXT. information I gathered at the Library. It was for Windows ’95 but is still valid.
Files Ending Like This... Usually Do This:
.AVI Contain movies in a special format that's playable through Media Player. (You don't need any special “ hardware to view the movies, but movie makers usually need expensive video grabbing cards.)
.BAT Short for batch files, these contain lists of DOS " commands, including Commands to load DOS programs. (Rarely used in Windows.)
.BFC Short for briefcase, these contain a Briefcase full of files to move back and forth between a desktop Computer and laptop. (See Chapter 5.)
.BMP Short for bitmap, these contain pictures or illustrations, usually created by Paint
.CAL Short for calendar, these contain appointments created by Calendar, a calendar program that came with older versions of Windows.
.CBT Short for Compute!" Based Training, these usually contain tutorials for Microsoft products.
.CDA Short for CD Audio Track, these stand for the songs playable by CD Player.
CPE. Fax cover sheets for the Fax Cover Page Editor.
.CRD Short for card, these contain the names and Pfc addresses created by Cardfile a program that came with the old version of Windows.
.CUR Short for cursor, these contain animated cursors that can be changed along with your mouse settings.
.DAT Short for data, these usually contain information for programs, not people, to peruse.
.DLL Short for Dynamic Link Library, these are lik.e miniprograms. Other programs often peek at these .DLL files for help when they're working.
.DOC Short for document these usually contain text stored by a word processor. Microsoft Word saves files ending in .DOC, for example. Unfortunately, a .DOC file created by one word processor can't always be opened by another word processor.
.DAV Short for driver, these files help Windows talk to parts of your computer like its keyboard, monitor, and various internal gadgetry.
.EPS Short for Encapsulated PostScriptfile, these contain information to be printed on PostScript printers. PostScript is a special format for expensive printers to read and print information created by expensive PostScript-compatible programs.
.EXE Short for executable, these contain programs. Almost all Windows programs end in .EXE; most DOS programs do, too.
.FLI These files contain animation - high-tech cartoon/movies - often made with programs by a company called Autodesk. They're not compatible with .AVI, so you can't watch 'em in Media Player. (See .AVI.)
.FND Short for Find, these contain a list of the files turned up through a search using the Start menu's Find program.
.FON A font that's not True Type compatible (see .TTF). Windows uses these fonts mostly for its menus, error messages, and other system information.
.GIF . Short for Graphic Interchange File, these contain pictures stored in a space-saving format invented by modem hounds on CompuServe. Paint can't view GIFs, although several shareware Windows programs can.
.GAP Short for group, these files let Program Manager a remnant from Windows 3.1 - remember which icons belong in which of its groups. When you double-click on a .GAP file, Windows 95 displays the contents in a
My Computer window.
.HLP Short for help, these contain the helpful information that pops up when you press F1 or choose Help from a program's menu.
.HT Short for HyperTerminal, these contain the settings HyperTerminal uses for dialing up other computers with your modem.
.ICO Short for icon, these contain..no kidding..ICONS.
.IDF Short for Instrument Definition Files, these contain the settings Media Player uses with your sound card or synthesizer.
.INF Short for information, these usually contain text for programs, not humans. Programs often grab information from .INF files when they're first installed. For example, a file called OEMSETUP.INF often lives on a program's floppy disk; Windows looks at the OEMSETUP.INF file for help when installing that program's drivers and other special goodies.
.INI Short for initialization, these files contain code-filled text for programs to use, usually so they can remember any special options a user has chosen. Unlike .INF files, described above, humans can fiddle with an .INI file's content to make programs work better - or worse.
.JPG Short for JPEG, these contain pictures, simi!ar to files ending In .GIF, BMP, and .PCX. Paint can’t view them, but several shareware viewers can.
.MID Short for MIDI, these files tell sound cards or synthesizers to play musical notes in a certain order. If everything goes right, the musical notes sound like a song.
.MPG Short for MPEG, these are just like .JPG files except they contain movies.
.MSG Short for Mail Message, these contain messages sent or received over the Exchange program.
.MOV Short for Movie, this contains a QuickTime file - the format Apple Macintosh computers use to store their files. Windows 95 can't view them; you need to get a QuickTime movie player program.
.PCX These contain pictures viewable in Paint. Paint can't save pictures in this format, however.
,PIF Short for Program Information File, these contain special instructions for Windows to treat DOS programs.
.RTF Short for Rich Text Format, these contain ASCII text with special codes. The codes let different brands of word processors swap files without losing groovy stuff like margins or italics. (Used by Word Pad, Microsoft Word for Windows, and many other programs.)
.SCR Short for screen, these files contain a screen saver program. Copy .SCR files to your Windows folder, and they appear on the Screen Saver menu in Control Panel's Desktop area.
.SHB Short for shortcut this file contains the information on how to access another file on your computer.
.SHS Short for scrap, this file contains a chunk of another file that's been dragged and dropped out of another program. For instance, if you highlight a paragraph in Word, then drag and drop that paragraph onto your desktop, the paragraph will be saved as a scrap on the desktop.
.SYS Short for system, these contain information designed for your computer or its programs - not for humans.
.TMP Short for temporary. Some Windows programs stash occasional notes in a file, but forget to erase the file after they're done. Those leftover files end in .TMP. Feel free to delete them if you're sure Windows isn't running in the background.
.TTF Short for True Type Font, a type of Windows font that can change its size smoothly.
. TXT Short for text, these files almost always contain plain old text, often created by Notepad.
. VXD Windows 95 looks at these files when controlling parts of your computer, like its printer or display. Similar files end in .VPD (a printer driver) or .VDD (a display driver!).
.WAV Short for waveform audio, these simply contain recorded sounds. Both Media Player and Sound Recorder let you listen to .WAV files.
.WKS The Microsoft Excel spreadsheet can read and write files in these format.
.WPD Short for Windows PostScript Driver, these files help Windows talk to those expensive PostScript printers. WordPerfect files also use this extension.
.WPG Short for WordPerfect Graphics, these files contain images stored in the graphics format used by WordPerfect.
.WRI Short for Write, these contain text created in the Write word processor- a Word Pad-like word processor that came with earlier versions of Windows. WordPad can read and write files in this format.
.ZIP These contain a file - or several files - compressed into one smaller file.
