List of file formats beginning with 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)
• .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 - Magix Music/Video
• .HDR - Pc-File+ Database headerDatafile (Egret); Message header text (Procomm Plus - 1st Reader)
• .HDW - Vector graphics (Harvard Draw)
• .HDX - Help index (AutoCAD - Zortech C++)
• .HEX - Hex dump
• .HFI - Hp Font Info file (GEM)
• .HFX - HotFax file; US Robotics Rapid Comm Voice Data file - Find out how eFax delivers faxes right to your email inbox. Try it free - instant activation.
• .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
• .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 - 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 - Adobe CS4 Web Premium – Student Edition
• .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)