List of Data File Formats Starting with the Letter "H"
| .h | Header file |
| .h! | On-line help file (Flambeaux Help! Display Engine) |
| .h++ | Header file (C++) |
| .h-- | Header file (Sphinx C--) |
| .ha | Compressed file archive created by HA (ha098.zip) |
| .ham | Image file |
| .hap | Compressed file archive created by HAP (hap303re.zip) |
| .hbk | Handbook (Mathcad) |
| .hbs | eBerry Transparent Animation - compressed bitmap files |
| .hcr | IBM HCD/HCM Production Configuration |
| .hdf | Hierarchical Data File graphics (SDSC Image Tools) |
| Help file (Help Development Kit) | |
| .hdl | Alternate download file listing (Procomm Plus) |
| .hdp | HD Photo File |
| Magix Music/Video | |
| .hdr | InstallShield Setup header |
| Pc-File+ Database header | |
| Datafile (Egret) | |
| Message header text (Procomm Plus - 1st Reader) | |
| .hds | Windows Digital Right Management file |
| .hdw | Vector graphics (Harvard Draw) |
| .hdx | Help index (AutoCAD - Zortech C++) |
| .hed | HighEdit document |
| .hex | Hex dump |
| .hfi | Hp Font Info file (GEM) |
| .hfx | HotFax file |
| US Robotics Rapid Comm Voice Data file | |
| .hgl | Hp Graphics Language graphics |
| .hh | C++ header file |
| .hhc | Table of Contents file |
| TurboTax Contents file | |
| .hhh | Precompiled header file (Power C) |
| .hhk | Help Workshop Index file |
| .hhp | Help information for remote users (Procomm Plus) |
| .hht | MS Messenger file |
| .hin | Molecule (HyperChem) |
| .his | Insight II Dynamics Trajectory History file |
| Spy-CD CD Search Database file | |
| .hlb | Help library (VAX) |
| .hlp | Help information |
| .hlz | Multi-Edit Packed Help file |
| .hm3 | Help & Manual 3 project Format |
| .hmm | Alternate Mail Read option menu (Procomm Plus) |
| .hnc | CNC program files Heidenhain (?) dialog |
| .hof | Hall Of Fame (game scores) |
| .hp8 | Ascii text HP Roman8 character set (NewWave Write) |
| .hpf | Hp LaserJet fonts (PageMaker) |
| .hpg | HPGL plotter file vector graphics (AutoCad - Harvard Graphics) |
| .hpi | Font information file (GEM) |
| .hpj | Help project (MS Help Compiler) |
| .hpk | Compressed file archive created by HPACK (hpack75.zip) |
| .hpm | Emm text (HP NewWave) |
| Alternate Main menu for privileged users (Procomm Plus) | |
| .hpp | C++ header file (Zortech C++) |
| .hqx | Compressed Macintosh ASCII archive created by BINHEX (xbin23.zip) |
| .hrf | Graphics (Hitachi Raster Format) |
| .hrm | Alternate Main menu for limited/normal users (Procomm Plus) |
| .hs2 | Monochrome image (Postering) |
| .hsi | Handmade Software Inc. graphics - almost JPEG (Image Alchemy) |
| .hst | Yahoo Messenger History file |
| History file (Procomm Plus) | |
| .hta | Hypertext application |
| .htc | HTML Component (mechanism for implementing Dynamic HTML in script) |
| .htf | WebBase File |
| .hti | WebBase File |
| .htm | HyperText Markup Language document |
| .html | HyperText Markup Language document |
| .htr | Motion Analysis Software Skeletal file |
| .htt | Hypertext template |
| .htx | Hypertext file |
| .hus | Husqvarna Designer I Embroidery Machine Format |
| .hwd | Presentation (Hollywood) |
| .hxm | Alternate Protocol Selection menu for all users (Procomm Plus) |
| .hxx | C++ header file |
| .hy1 | Hyphenation algorithms (Ventura Publisher) |
| .hy2 | Hyphenation algorithms (Ventura Publisher) |
| .hyc | Data (WordPerfect) |
| .hyd | Hyphenation dictionary (WordPerfect for Win) |
| .hyp | Compressed file archive created by HYPER (hyper25.zip) |
| .hyt | VFSMOD Project output file |
