Computer file extensions - #

Updated: 06/30/2019 by Computer Hope

Below is a listing of file extensions that begin with a number or another character that is not a letter. If you are looking for a file extension that starts with a different letter, click the corresponding beginning letter below.

#
.$$$ Temporary file.
.$$A OS/2 program file.
.$$F OS/2 database file.
.$$S OS/2 spreadsheet file.
.$D$ OS/2 planner file.
.$DB dBase IV temporary file.
.$ED Microsoft C temporary editor file.
.$VM Microsoft Windows temporary file for virtual managers.
._DD Norton Disk Doctor recovery file.
._DM Nuts n' Bolts disk minder recovery file.
.--- File used to backup of sys, ini, dat, and other important files from Windows 3.1.
.075 Ventura Publisher 75x75 dpi screen characters.
.085 Ventura Publisher 85x85 dpi screen characters.
.091 Ventura Publisher 91x91 dpi screen characters.
.096 Ventura Publisher 96x96 dpi screen characters.
.0B Pagemaker printer font LineDraw enhanced characters.
.1ST File used by some software manufacturers to represent a file that should be read first before starting the program.
.2GR File used in Windows 3.x to display the graphics on older 286 and 386 computers.
.386 Virtual machine support files for the 386 enhanced mode.
.3DT Topicscape database for 3D mind map or 3D concept map.
.3G2 See the 3gp definition.
.3GP See the 3gp definition.
.3GR File used in Windows 3.x to display the graphics on later 386, 486, and Pentium computers.
.4SW 4DOS swap file.