File Extensions "$-9"

File Extensions

File extensions are often used to determine the program that created the file. While users can rename files and/or associate odd extensions with particular programs, the following are some fairly standard associations.

Please let me know if you have applications not listed here, please advise so I can add them to the list. 

You can click on the first letter of the extension to go to that group

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

 
.$$$ Temporary File
.$$A OS/2
.$$F OS/2 Database
.$$P OS/2 Notes
.$$S OS/2 Spreadsheet
.$D$ OS/2 Planner
.$DB DBase Temp File
.$ED Temp Editor File
.$VM Virtual Managers Temp File

._DD Norton Disk Doctor Recovered File
._DM Nuts n Bolts Disk Minder Recovered File

.000 (000-999) Sequentially Numbered Backup Files
.075 Ventura Publisher 75dpi Screen Characters
.085 Ventura Publisher 85dpi Screen Characters
.091 Ventura Publisher 91dpi Screen Characters
.096 Ventura Publisher 96dpi Screen Characters
.0B PageMaker Printer Font LineDraw Characters

.12M Lotus Smartmaster File
.123 Lotus File
.15U PageMaker Printer Font
.1PE TurboTax Form File
.1ST Information (e.g., README.1ST)

.286 Windows Standard Mode Driver
.2GR Windows EGA/VGA Screen Grabber

.301 Fax Data
.303 Seq-303 Settings
.320 Chromelion Demo Data File
.323 H.323 Internet Telephony
.340 Chromelion Demo Data File
.386 Windows Enhanced Mode Driver or Swap File
.3DM 3D Modeler File
.3DP Serif 3D Plus
.3DS 3D Studio Graphic
.3FX Corel Chart 3D Effect
.3GR Windows SVGA/XVGA Screen Grabber
.3IN MSN Setup Information

.4GE Informix 4GL Compiled Code
.4GL Informix 4GL Source
.4SW 4DOS Swap File
.4TH FORTH Program

.669 669 Tracker Module or Unis Composer Music File

.8 A86 Assembler Program File
.8BA Adobe PhotoDeluxe Plugin (also ends in E, F, I, X, & Y)
.8M PageMaker Math 8 Printer Font
.8U PageMaker Roman 8 Printer Font

.906 Calcomp Plotter File

.?q? Squeeze

.~ Temporary File
.~MN Norton Menu Backup
.~SG TapCIS Message Index File