2.
A5W - Alpha Five Webpage File
7.
ADS - Ada Specification File
8.
ADT - AutoCAD Audit Log
9.
AIM - AIMMS ASCII Model File
10.
ALE - Avid Log Exchange File
11.
ALX - BlackBerry Application Loader XML File
13.
ANX - HotDocs answer file
15.
APR - ArcView Project File
16.
APT - Almost Plain Text File
17.
AQT - AQTitle Subtitles File
18.
ARENA - Quake 3 Engine Arena File
19.
ARFF - Weka attribute-relation file
20.
AS - ActionScript File
21.
ASA - ASP Configuration File
22.
ASC - Autodesk ASCII Export File
23.
ASCII - ASCII Text File
24.
ASE - Autodesk ASCII Scene Export File
25.
ASHX - ASP.NET Web Handler file
26.
ASM - Assembler source code file
27.
ASP - Active Server Page
29.
ATH - Alienware AlienFX Theme File
30.
ATT - Web Form Data file
31.
AVS - AviSynth Script File
33.
B - BASIC Source File
34.
B - BuRg3r Definition File
35.
BAT - Batch file (executable)
36.
BBS - Bulletin Board System Text
37.
BBZ - BerryBuzz Backup File
38.
BET - BETA Source File
39.
BIB - Bibliography Document
40.
BMK - Nokia Device Bookmark File
41.
BOOK - Budget In Brief Book File
42.
BPD - Quicken backup disk file
43.
BPW - Bitmap World File
44.
BWP - BuRg3r Web Page
45.
CA - Initial Telnet Cache
46.
CEL - Celestia Script File
47.
CF - Sendmail Configuration File
48.
CFG - Configuration File
49.
CFG - Cal3D Model Configuration File
50.
CFG - Wesnoth Markup Language File
51.
CGI - Common Gateway Interface Script
52.
CHT - Windows Chinese Traditional Noise-Word List File
53.
CONF - Generic Configuration File
54.
CPQ - Compaq OEM Disc Configuration File
55.
CPR - Windows Phone Display Settings File
57.
CRWL - Windows Crawl File
59.
CSS - Cascading Style Sheet
60.
CSX - Visual C# Script
61.
CU - CUDA Source Code File
64.
DBA - DarkBASIC Source Code File
65.
DDL - Data Definition Language File
66.
DFU - LaTeX Font Encoding File
67.
DIF - Data Interchange Format
68.
DRC - DRM Rights Object
69.
DSC - Text Description File
70.
DTD - Document Type Definition File
71.
DXL - Rational DOORS Script
72.
EDI - Electronic Data Interchange File
73.
EXAMPLE - Example Configuration File
74.
FAL - Bitmap Graphic Header Information
75.
FDR - Windows Error Report File
76.
FFD - SharePoint FFDDumper Log
77.
FIMPP - FiM++ Source Code File
78.
FPI - FPS Creator Intelligence Script
79.
FRM - Visual Basic Text Form
80.
FX - Direct3D Effects File
81.
GAL - GenePix Array List File
82.
GALAXY - Blizzard Galaxy File
83.
GEMSPEC - Gem Specification File
86.
GSC - Call of Duty Game Script
87.
GSD - General Station Description File
88.
GTHR - Gather Log File
89.
H - C/C++/Objective-C Header File
92.
HDML - Handheld Device Markup Language File
94.
HHT - Help and Support Center HHT File
95.
HLB - VMS / VAX Help Library
96.
HPF - High Performance Fortran File
97.
HRL - Erlang Header File
98.
HS - Java HelpSet File
99.
HSK - Huskey Truss & Building Supply Import File
101.
HTM - Hypertext Markup Language File
102.
HTML - Hypertext Markup Language File
103.
HTX - HTML Extension File
104.
HWP - Hangul (Korean) Text Document
105.
IDF - MIDI Instrument Definition File
106.
IIL - CleanSweep Installation Log
107.
IML - IntelliJ IDEA Module
109.
INF - Setup Information File
110.
INFO - Generic Information File
111.
INFO - Drupal Module Information File
112.
INI - Windows Initialization File
113.
INI - Symbian OS Configuration File
114.
INS - LaTeX Installer Script
115.
ION - File Description File
116.
IPF - OS/2 Help File
117.
ISS - Inno Setup Script
118.
JAM - JAM Musical Score
119.
JARVIS - Jarvis Subscriber File
120.
JAV - Java Source File
121.
JAVA - Java Source Code File
122.
JGW - JPEG World File
123.
JPGW - JPEG World File
124.
JPR - Fugawi Projection File
125.
JS - JavaScript File
126.
JSON - JavaScript Object Notation File
127.
JSPF - Java Server Page Fragment
128.
JSPX - XML Java Server Page
129.
KB - C++ Keyboard Script
130.
KIX - KiXtart Script File
133.
KOR - Windows Korean Noise-Words List File
134.
LDF - Lingoes Dictionary Source File
135.
LEF - LEN Exchange Format File
136.
LEGAL - DaveTech Legal Document
137.
LIST - JAR Index File
138.
LIT - Literate Haskell Script
140.
LOL - LOLCODE Source Code FIle
141.
LPD - LPD Daemon Print Permissions File
142.
LST - GRUB Boot List File
144.
LUA - Lua Source File
145.
LUF - Lipikar Uniform Format File
146.
LYT - TurboTax Install Log File
147.
M - Mathematica Input File
148.
M - Mercury Source Code File
149.
M4 - Macro Processor Library
151.
MAKE - Xcode Makefile Script
155.
MD - Machine Description File
157.
MDL - Warcraft 3 3D Model Text File
158.
MDOWN - Markdown File
159.
ME - Readme Text File
160.
MF - Java Manifest File
161.
MISSION - Vega Strike Mission File
162.
MNU - TomTom Menu File
163.
MOF - Managed Object Format File
164.
MPL - MPL2 Subtitles File
165.
MPS - Mathematical Programming System File
166.
MRK - DPOF Auto Print Order File
167.
MWS - MWave DSP Synth Instrument Extract
168.
NB - Mathematica Notebook
169.
NEKO - Neko Source Code File
170.
NFO - Warez Information File
171.
NIM - Nimrod Source Code File
172.
NLS - NetLogo Source File
174.
NSH - NSIS Header File
176.
NXC - Not eXactly C Source Code File
177.
OCR - FAXGrapper Fax Text File
178.
ODF - Battlezone Object Definition File
182.
P6 - Perl 6 Source Code File
183.
PAGE - HybridJava Web Page
184.
PANIC - Kernel Panic File
185.
PB - PureBasic Source File
186.
PBM - Portable Bitmap Image
187.
PBN - Portable Bridge Notation File
188.
PCH - Precompiled Header File
189.
PDM - VB Project Information File
190.
PGP - AutoCAD Program Parameters File
191.
PHL - Kindle Popular Highlights File
192.
PHP - PHP Source Code File
193.
PHP4 - PHP 4 Web Page
194.
PHP5 - PHP 5 Web Page
195.
PHTM - PHP-Based Web Page
196.
PHTML - PHP Web Page
197.
PID - Process ID File
198.
PJS - Phoenix Subtitles File
199.
PKB - Oracle Package Body File
200.
PLA - Sansa Playlist File
201.
PLIST - Mac OS X Property List File
203.
PNACH - PCSX2 Patch File
205.
POT - Portable Object File
206.
PP - Pocket Physics Sketch File
207.
PPM - Portable Pixmap Image File
209.
PRG - RAPID Program File
213.
PSB - PowerDivX Subtitles File
214.
PSP - PL/SQL Server Page
216.
PYM - PYM Macro Preprocessor File
217.
QC - QuakeC Source Code File
219.
QF - Nokia Maps Version File
220.
RBC - Rembo-C Script
222.
RJS - Ruby Javascript File
223.
RNC - RELAX NG Compact Syntax File
224.
RPT - Generic Report
225.
RS - Rust Source Code File
226.
RZK - File Crypt Password File
227.
SB - Small Basic Source Code File
228.
SC2LOCALE - Blizzard StarCraft 2 Localization File
229.
SCA - Scala Script File
232.
SCRIPT - Generic Script File
235.
SCT - Windows Scriptlet
236.
SEQ - DNA Sequence Text File
237.
SHA1 - SHA-1 Hash File
238.
SHA512 - SHA 512 Hash File
239.
SHADER - Quake 3 Engine Shader File
240.
SHTM - HTML Server Side Include File
241.
SHTML - Server Side Include HTML File
242.
SKI - Motorola Phone Skin File
243.
SL - Software License File
244.
SLS - Image Playlist
245.
SMALI - Android Smali Assembly Language File
246.
SML - ARC/INFO Simple Macro Language File
247.
SMS - Exported SMS Text Message
248.
SPEC - RPM Specification File
249.
SRT - SubRip Subtitle File
250.
SSC - Celestia Solar System Catalog File
251.
SSF - Structured Subtitle Format File
252.
STC - Siemens Theme File
254.
SVX - Survex Cavern Data File
255.
TAB - Guitar Tablature File
256.
TAB - Tab Separated Data File
257.
TAK - TAK 2000 Thermal Model File
258.
TDA - Java Application Thread Dump
259.
TEXT - Plain Text File
260.
TLB - VAX Text Library
261.
TRI - Triangle Mesh File
262.
TTXT - MPEG-4 Timed Text Subtitles File
263.
TUR - Turing Program Source File
264.
TXT - Plain Text File
265.
UNX - Unix Text File
266.
UPD - Program Update Information
267.
USF - Universal Subtitles Format File
268.
UTXT - Unicode Text File
271.
VC4 - Visual C++ 4 File
272.
VDF - Valve Data File
273.
VDM - VEDIT Macro File
274.
VEC - Orbiter Vector Map File
275.
VHD - VHDL Source File
276.
VP - Vertex Program File
277.
WCF - WebEx Saved Chat Session
278.
WIDGET - HybridJava Widget
279.
WN - WriteNow Text Document
280.
X - Lex Source Code File
281.
XDL - XML Schema File
283.
$01 - MS-DOS pipe file
284.
1 - Unix Section 1 Man Page