Extension Description Author File / Link
pfx Windows name for PKCS #12 bundles with private key and certificate chain Microsoft / RSA Laboratories / IETF Link
prn-ext Windows PRN Print Files Download
pst Microsoft Outlook personal folders file for mail, calendar, and contact data (see also .ost) Microsoft Link
reg Windows Registry File Format (ASCII .REG format) Jeroen Mostert Download
Windows Registry Files system.dat and user.dat (and CONFIG.POL format) Download
res Win32 Resource File Format Marco Cocco Download
Windows Resource (.RES) Files Ray Lischner Download
rle ULAH RLE Format (Acrobat) Spencer W. Thomas Download
scf Windows Explorer Command Files James Van Sickle Download
scr Windows screen saver files Paul Oliver Download
shd Windows 2000 SHD Spoolfile Format Christoph Lindemann Download
tcp-ip Microsoft Windows NT 3.5/3.51/4.0 TCP/IP Implementation Details, TCP/IP Protocol Stack and Services, Version 2.0 (Word) Dave MacDonald Download
ttf TTF free source project Link
Opentype Spec Microsoft Corp. Link
Truetype Spec 1.66 Microsoft Corp. Download
vhd Microsoft virtual disk image format with fixed, dynamic and differencing variants Microsoft Link
vhdx Microsoft virtual disk image format succeeding VHD, with larger capacity and power-failure protection Microsoft Link
wav Microsoft WAV Sound File Format (MS Word) Rob Ryan/Robert Shuler Download
WAVE File Format Microsoft Download
WAVE formats and compression types Microsoft Download
wmf Windows Metafile Format Microsoft Corp. Download
Windows Metafile Format WMF/EMF/APM (html) O'Reilly & Associates, Inc. Download
More information on WMF files Caolan McNamara Deprecated resource Link
wri Windows 3.1 Write Format Sean Young Download