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Finally, a place to put all your computer disks, cd's and dvd's

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Computer Tutorials

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Tired of your computer disks being scattered all over the place?


What are the different kinds of files?


Extensions are three letters or numbers that appear at the end of a file name and indicate what type of file it is. What the file is used for. And if it will work on your computer.

Below is a list of common file extensions and information on the type of file (graphics and sounds) they signify:


(Pictures on a computer are referred to as Graphics)

The following formats are files that are used to display pictures on your computer. Please read the list below to see which ones work best on your computer.

.BMP (bitmap) -- a type of graphics file. These files are normally used for things like cartoon images. AOL's software can display these files.

.GIF (Graphics Interchange Format) -- a type of graphic image very common in online services and the Internet. GIF includes file compression as part of its definition, so no additional file compression software is needed. AOL's software can display these.

.JPG or .JPEG (Joint Photographers Experts Group) -- a graphics format designed to take up as little space as possible while retaining as much quality as possible. JPG files are smaller than GIF files, but take longer to display. AOL's software can display these.

.ART Indicates a graphics file compressed using AOL's Johnson-Grace system. These files can be viewed using your AOL software but can't be opened with most other programs.

.PCX Indicates older graphics files, commonly used for clip art. AOL's Windows software can display these files.

.PCT or .PICT Indicates the original Macintosh graphics format. AOL's Macintosh software will display these files. Does not work on IBM computers.

.EPS (Encapsulated Postscript File). These are images designed for vector, or line-based, graphics. Drawing programs such as Adobe Illustrator use this format. AOL's software cannot display these.

.TIF Tagged Image Format -- bitmapped graphic images popular among desktop publishers. AOL's software cannot display these.


The following file types are used to play sounds or music on your computer.

Some of them will work on your computer and some won't. Please read the list below to see which of these files will work on your computer.

.WAV (Windows sound file). These files are used for playing music, sounds and voices. Mac users can find utilities in the Software Center at Keyword: Software to convert them to sound files that the Macintosh can play.AOL's Windows software can play these files
.MID (.MIDI) (Musical Instrument Digital Interface file) MIDI files are songs for most sound cards and MIDI boards. These songs are generally digitized versions of songs and sound like the Muzak played in elevators and stores. AOL's software can play these files.

(sound file from the Internet) AOL's software can play these files, but more commonly uses MIDI's and WAV files.

.MOD Music module. These are music files that include the instruments as well as the score, and they play through a sound card, not MIDI. You will need a special program to play these files in Windows or on the Macintosh.

.SND Indicates a sound file. These are Macintosh System 7 sounds that can be played on Windows using converters such as SOX. AOL's Macintosh software will run these files. Does not work on IBM computers.


.AVI Audio Visual File (movie), used for Windows video files.It is best to go into Windows Explorer to open these files by double clicking on them . Generally an AVI is a short movie, that sometimes even has sound. Generally, these files are to big to open in AOL, and have to be opened in Windows Explorer.


There are many types of files used to send email: They include email, doc, txt, and many others. Generally, most of these are able to work on "most" but not all servers. However there is one type of file that often gets sent from MAC computers that cannot be read by IBM users. MIME files...

.MME Multipurpose Internet Mail Extensions (MIME) file. MIME converts a binary attachment (a program or word processing document or even an image) to a text format that can be handled by the machines that send e-mail through the Internet. You will need a special MIME decoder to turn the file back into it's original file type. For more information on MIME converters, see Keyword: MIME . NOTE: It is recommended that whenever possible,  you do not send email using this format, because most people using IBM computers will not be able to read it.


.SCR Indicates a Windows screen saver file. These will not work unless placed in your C:\Windows directory.

.LOL There is no such thing but I felt you needed a laugh. The Tedster

File Extension Directory

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