H
Program header (C)
HA
Compressed archive (HA)
HAM
Driver file (Novell Netware)
HAP
Compressed archive (HA)
HBK
Handbook (MathCad)
HCM
Configuration file (IBM HCM)
HCOM
Sound Tools file (HCOM)
HCR
Production configuration file (IBM HCD/HCM)
HDF
National Center for Supercomputing Applications (NCSA) Geospatial Hierarchical Data
HDF
Help file (Help development kit)
HDL
Alternate download listing (ProComm Plus)
HDR
Database header (Pc-File+)
HDR
Datafile (Egret)
HDR
Message header text (ProComm Plus)
HDR
Message header text (1st Reader)
HDW
Vector graphics (Harvard Draw)
HDX
Help index (AutoCAD)
HDX
Help index (Zortech C++)
HED
Document (HighEdit)
HEL
Hellbender saved game (Microsoft)
HEX
Macintosh BinHex 2.0 file
HFI
HP font info (GEM)
HGL
Drawing file (HP Graphics Language)
HH
Help system map (Generic)
HH
Header file (C++)
HHH
Precompiled header (Power C)
HHP
Help information for remote users (ProComm Plus)
HIT
Audio file (HitPlayer)
HLB
Help library (VAX)
HLP
Help file (Generic)
HLP
Windows Help file (DataCAD)
HMM
Alternate mail read option menu (ProComm Plus)
HNC
Program files (CNC)
HOG
Lucas Arts Dark Forces WAD file
HOG
Mission file (Descent 1-2)
HOG
Main data package file (Descent3)
HOT
Document file (HotSend)
HP8
Ascii text Roman8 character set (NewWave Write)
HPC
Font language file (Hewlett-Packard)
HPF
HP LaserJet font (Adobe Pagemaker)
HPF
Partial download file (HotLine)
HPG
HPGL Plotter vector graphics (AutoCAD)
HPG
HPGL Plotter vector graphics (Harvard Graphics)
HPI
Font information (GEM)
HPJ
Help Project file (Visual Basic)
HPK
Compressed archive (HPACK)
HPM
Emm text (HP NewWave)
HPM
Alternative menu for privileged users (ProComm Plus)
HPP
Program header (C++)
HPP
Header file (Zortech C++)
HQX
BinHex (Macintosh 4.0)
HRF
Rastor graphic (Hitachi)
HRM
Alternate menu for limited users (ProComm Plus)
HS2
Monochrome image (Postering)
HSI
Graphic (Handmade Software, Inc.)
HST
History file (Generic)
HST
History file (ProComm Plus)
HT
HyperTerminal file
HTM
A Web page (a file containing Hypertext Markup Language - HTML - markup)
HTML
A Web page (a file containing Hypertext Markup Language - HTML - markup)
HTT
Hypertext template (Microsoft)
HTX
Template (Extended HTML)
HWD
Presentation (Hollywood)
HWP
Korean word processor document format (HanGul)
HXM
HAM extension (Descent2)
HXM
Alternate protocal selection menu (ProComm Plus)
HXX
Header file (C++)
HY1
Hyphenation algorythm (Ventura Publisher)
HY2
Hyphenation algorythm (Ventura Publisher)
HYC
Datafile (Microsoft WordPerfect for Windows)
HYD
Hyphenation dictionary (Microsoft WordPerfect for Windows)
HYM
3D Image binary file (Hymarc Scandata Scanner)
HYP
Compressed archive (HYPER)
H!
On-line Help (Flambeaux Help!)
H++
Header file (C++)
H--
Header file (Sphinx C--