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Real Computer Help Online: From the beginner to the seasoned user, this website is designed to answer all of your computer questions and take some of the frustration out of trying to use Windows.

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File Extensions

Files end in a "dot" and a two, three, or four letter file extension. The file extension tells you what type of file it is, what program uses that extension, and is used by your operating system to launch the appropriate program.

Select the first letter of the extension to jump to the appropriate section.
A B C D E F G H I J K L M N O P Q R S T U V W X
Y Z $ ~ 0 1 2 3 4 8 9 FTP

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- $ -

$$$ - Temporary file

$$A - PROGRAM NAME: OS/2

$$F - Database file PROGRAM NAME: OS/2

$$P - Notes PROGRAM NAME: OS/2

$$S - Spreadsheet file PROGRAM NAME: PMSPREAD OS/2

$D$ - Planner file PROGRAM NAME: OS/2

$DB - Temporary File PROGRAM NAME: DBASE IV

$ED - Temporary Editor file PROGRAM NAME: MS C

$VM - Temporary File from Virtual Managers PROGRAM NAME: MS WINDOWS

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- ~ -

~ - Temporary File

~MN - Menu Backup PROGRAM NAME: NORTON COMMANDER

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- 0 -

075 - 75x75 dpi screen characters PROGRAM NAME: VENTURA PUBLISHER

085 - 85x85 dpi screen characters PROGRAM NAME: VENTURA PUBLISHER

091 - 91x91 dpi screen characters PROGRAM NAME: VENTURA PUBLISHER

096 - 96x96 dpi screen characters PROGRAM NAME: VENTURA PUBLISHER

0B - Printer Font LineDraw enhanced characters PROGRAM NAME: PAGEMAKER

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- 1 -

15U - Printer Font PROGRAM NAME: PAGEMAKER

1ST - ASCII Text, Program Information STANDARD FORMAT: README.1ST

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- 2 -

286 - Driver Standard Mode PROGRAM NAME: MS WINDOWS

2GR - Screen Grabber EGA/VGA Mode, allows Windows to display text and graphics in standard mode on a 286 or 386 computer PROGRAM NAME: MS WINDOWS

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- 3 -

301 - FAX Data file PROGRAM NAME: SUPER FAX 2000

386 - Driver 386 Enhanced Mode Swap file. Enables computer running in enhanced mode to use Windows with virtual memory. PROGRAM NAME: MS WINDOWS

3DS - Graphic PROGRAM NAME: 3D STUDIO

3FX - 3-D Effect PROGRAM NAME: COREL CHART

3GR - Screen Grabber SVGA/XVGA Mode, allows Windows to display text and graphics in enhanced mode on a 386, 486, or Pentium computer. PROGRAM NAME: MS WINDOWS

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- 4 -

4SW - Swap File PROGRAM NAME: 4DOS

4TH - FORTH Program File PROGRAM NAME: FORTH CMP

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- 8 -

8 - A86 Assembler Program File

8M - Printer Font Math 8 enhanced characters PROGRAM NAME: PAGEMAKER

8U - Printer Font Roman 8 enhanced characters PROGRAM NAME: PAGEMAKER

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- 9 -

906 - Calcomp plotter
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- FTP -

Common file extensions on FTP servers include:

.txt - Plain text.

.htm and .html - HTML text documents.

.jpg and .gif - Types of image files.

.wav, .au, .snd - Types of sound files.

.zip - PC compressed file archive.

.sea and .sit - Macintosh compressed file archives.

.hqx, .mme, .uue, .bin - Various file encoding methods.

If you download a file named oceansounds.zip.uue, you know that the file has been UUencoded and made into a zip archive, which means that you have to Uudecode it and "unzip" the archive. File extensions also help your FTP client or Web browser figure this out, so it can process the files automatically.

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