| Extension |
Meaning / Link |
| .H |
Header (Usually C
Compiler) |
| .H! |
Flambeaux Tutorial
Database |
| .H++ |
C++ Header File |
| .H-- |
Sphinx C-- Header
File |
| .HA |
Compressed Archive |
| .HAM |
Image File |
| .HBK |
Mathcad Handbook |
| .HDF |
Hierarchical Data
Format File |
| .HDL |
Procomm
Plus Alternate Download File Listing |
| .HDR |
Procomm
Plus Message Header, PC-File+ Database Header |
| .HDX |
Help Index (Various) |
| .HED |
HighEdit Document |
| .HEL |
MS
Hellbender Saved Game |
| .HEX |
Hex Dump, Macintosh
BinHex 2.0 File |
| .HFI |
HP Font Info |
| .HFX |
HotFax File |
| .HGL |
HP Graphics Language |
| .HH |
C++ Header, Help
Topic Map File |
| .HHC |
Table of Contents
File (HHW Application), TurboTax
Contents File |
| .HHH |
Power C Precompiled
Header |
| .HHK |
Help Workshop Index
File |
| .HHP |
Procomm
Plus Help Data |
| .HHP |
HTML Help Project |
| .HLP |
Windows Help File |
| .HMI |
Descent
Human Machine Interfaces MIDI File |
| .HMM |
Procomm
Plus Alternate Mail Read Option Menu |
| .HMP |
Descent
Human Machine Interfaces MIDI File |
| .HOF |
Hall Of Fame
(scores) |
| .HOG |
Lucas Arts Dark
Forces WAD File, Descent
Mission File |
| .HPF |
PageMaker
HP LaserJet Fonts |
| .HPG |
Hewlett-Packard
Graphics (plotter) |
| .HPI |
Gem Font Information |
| .HPJ |
Help Project File |
| .HPK |
Compressed Archive |
| .HPL |
HP Graphics File
|
| .HPM |
Procomm
Plus Alternative Menu |
| .HPP |
C++ Program Header |
| .HPR |
RoboHELP
Configuration File |
| .HQX |
Binhex Text
Conversion File (Macintosh) |
| .HRL |
Herolab EasyWin32 |
| .HPM |
Procomm
Plus Alternate Main Menu |
| .HPP |
Zortech C++ Header |
| .HPR |
RoboHelp
Configuration |
| .HQX |
Macintosh BinHex 4
Compressed Archive |
| .HRM |
Procomm
Plus Alternate Main Menu |
| .HRX |
Herolab EasyWin32 |
| .HRZ |
Image File |
| .HSQ |
Data
File Associated with Qaz Trojan |
| .HSS |
Photoshop
Hue/Saturation Information |
| .HST |
History File, Procomm
Plus History File, Host File |
| .HT |
HyperTerminal |
| .HTA |
Hypertext
Application (run apps from HTML doc) |
| .HTF |
WebBase
File |
| .HTI |
WebBase
File |
| .HTM |
Hypertext Markup
Language |
| .HTT |
Hypertext Template |
| .HTX |
Extenended Hypertext
Template, Internet Database Connector File |
| .HWP |
Hangul Word
Processor File |
| .HXM |
Procomm
Plus Alternate Protocol Selection Menu, Descent2
HAM File |
| .HXX |
C++ Header |
| .HY1 |
Ventura
Publisher Hyphenation Algorythm |
| .HY2 |
Ventura
Publisher Hyphenation Algorythm |
| .HYC |
WordPerfect
Hyphenation File |
| .HYD |
WordPerfect
Hyphenation Dictionary |
| .HYP |
Hypertext File,
Hyphenation File, Compressed Archive |
| .HZ |
Chinese |
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