Alphabetic File Extension List

The file extension list you requested is shown on this page. It loads as a table so please give it a moment as some of the lists are quite long. These lists contain basic information: the extension, the name of the program it works with, the specific function of the file, and the company that makes the program. Not all extensions have all of the data. Click on the extension of interest to see the detail page for that extension. Total extensions in this particular list: 593.

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Extension Information
H ADS Include File (Autodesk, Inc.)
H Header
H Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
H! Flambeaux Tutorial Database
H++ C++ Header File
H-- Sphinx C-- Header File
H0 Magix Musstu File
H1 Bruker Aspect NMR Data File
H1 Magix Musstu File
H16 VC98 Include 16-bit File
H19 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
H2O Water Web Program File (Clear Methods, Inc.)
H2O Liquid Entertainment H2O Compressed Archive (Liquid Entertainment)
H2O H2OMAP Water Master Project File (MWH Soft)
H32 BC45 32-bit Include File
H3M Game Map File
H3R H3R Panasonic Video Camera File (Panasonic Corporation of North America)
H4C Heroes of Might and Magic Map File
H4R Possible Container for .MP3 Files
H4V MPEG-4/AVC, H.264 Video File
H5 HDF5 Data File (The National Center for Supercomputing Applications)
H5B SuperHeat 5 Building File (Survey Design Associates Ltd.)
H5R WV-AS50A CD-R Video File (Panasonic Corporation of North America)
H64 H.264 Format
H6C SPP File
HA Compressed Archive
HAB HelpMaker Backup file (Vizacc)
HAD MixlleniumEngine (Haydee) Web Server Module Style File
HAF HEAT Archive File
HAI NTgraph Nt09b-2b EMX Library File
HAIRY Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HAK BioWare Aurora Engine File (BioWare Corp.)
HAK GameHack File
HAK Neverwinter Nights File
HAL Hyper Access Lite OS/2 Data File
HAL Mortyr Archive
HAL Enterprise ERP system Source code files (HansaWorld)
HALOGEN Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HAM Amiga Hold and Modify Image (Amiga, Inc.)
HAM Novell NetWare Disk Drivers NPA
HAMMER Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HAN Viewpoint Headline Studio
HAND Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HANOI Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HAP Hamarsoft HAP 3.x Compressed Archive
HAPTAR People Putty Haptek Character (Haptek, Inc.)
HAR e-Sword Harmony Resource (Rick Meyers)
HARP Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HARPSAC Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HARPSAC2 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HARRIER Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HASH EnCase Forensic Drive Image Hash (Guidance Software, Inc.)
HAT Formula 1 Car Race 2001 Log Hat File
HAT HAT (HOORA Analysis Tool) Model
HAV Video Recorder Video File
HAY MixlleniumEngine (Haydee) Web Server Module Content File
HAZ Flight Simulator Texture File (Microsoft Corporation)
HAZ Train Simulator Hazard File (Microsoft Corporation)
HBB HAHTtalk Object File
HBC Home Buyers Calculator Suite
HBC HyperBac Compressed File (HyperBac Technologies, Inc.)
HBC2 HyperBac Compressed File (HyperBac Technologies, Inc.)
HBE HyperBac Compressed/Encrypted File (HyperBac Technologies, Inc.)
HBI Handy Backup Backup Index File (Novosoft LLC)
HBK Hex Workshop Hex Editor Bookmark File (BreakPoint Software, Inc.)
HBK Humanic Software Accounting Data
HBK MathCAD Handbook (Mathsoft Engineering & Education Inc.)
HBK Auto Backup Backup Archive (Han-soft Software)
HBK HandyCafe Database File (Ates Software)
HBM Hotline Book Mark (Hotsprings Inc.)
HBX Starmoney Macro file
HBZ Starmoney Macro file
HC BI/Suite Hypercube
HC Header File
HC High Resolution Cantone TIFF Bitmap
HCA Hammer Call Analyzer IP and TDM Network Traffic (Empirix Inc.)
HCC HydroCAD Stormwater Modeling System Storage Chamber Definition (HydroCAD Software Solutions LLC)
HCD C Poet Examples Advanced Inc File
HCE HydroCAD Stormwater Modeling System Hydrograph File (HydroCAD Software Solutions LLC)
HCF 123 Heading Creator Project File (Mark Hendricks and Hunteridge, Inc.)
HCG HCLab HCSoft Chart (HCSoft Programación, s.l.)
HCI HydroCAD Stormwater Modeling System IDF File (HydroCAD Software Solutions LLC)
HCL Handwritten Claims Log
HCM IBM HCM Configuration
HCOM Macintosh Sound
HCP HydroCAD Stormwater Modeling System Project File (HydroCAD Software Solutions LLC)
HCR HydroCAD Stormwater Modeling System Rainfall Definition (HydroCAD Software Solutions LLC)
HCR Half-fold Card File
HCR IBM HCD/HCM Production Configuration
HCSP Content Server Web Page (Stellent, Inc.)
HCSS Hyper Color Swatch Set (SodaBush)
HCT Symantec Anti-Virus Live Update File (Symantec Corporation)
HCU HydroCAD Stormwater Modeling System Units Definition File (HydroCAD Software Solutions LLC)
HCW HTML Help Workshop Conversion Wizard Macro (Microsoft Corporation)
HCX Harvard Graphics Chart XL Chart (Harvard Graphics)
HD Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HD2 Curious Labs Poser Hand File
HDA HotDocs Auto-Assemble File (Matthew Bender & Company, a member of the LexisNexis Group)
HDAT vStaticIP Data File (Phil Doyle a.k.a. MrJolly)
HDAT Objective Analysis Package Data File
HDB ACT! History File (Best Software CRM Division)
HDB Nero HD-Backup (Nero AG)
HDC HelloDOC Medical Software File (IMAGINE Éditions)
HDC HD Tach Benchmark File (Simpli Software Inc.)
HDD Parallels Desktop for Mac Hard Disk Drive Image (Parallels, Inc.)
HDD HelloDOC Medical Software File (IMAGINE Éditions)
HDF Help Development Kit Help File
HDF Hierarchical Data Format File
HDF Procomm Plus Alternate Download File Listing
HDF Amiga Hardfile Image
HDI HotDocs Auto-Install File (Matthew Bender & Company, a member of the LexisNexis Group)
HDI AutoCAD Heidi Device Interface (Autodesk, Inc.)
HDI HelloDOC Medical Software File (IMAGINE Éditions)
HDK OS/2 Saved SKF Format File (IBM)
HDK MAXI Disk Disk Image (Herne Data Systems Ltd.)
HDL HotDocs Library File (Matthew Bender & Company, a member of the LexisNexis Group)
HDL Giza Specifier Hidden Line Drawings (20-20 Technologies)
HDL Procomm Plus Alternate Download File Listing
HDM Handheld Markup Language File
HDML Handheld Markup Language File
HDMOV QuickTime HD Movie (Apple Inc.)
HDMP WinXP Trouble Report
HDO Helpdesk-One File
HDP Magix Music/Video
HDP HDL Designer Project File (Mentor Graphics Corp.)
HDR InstallShield Setup Header (Acresso Software Inc.)
HDR Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HDR Photomatix HDR Image (HDRsoft)
HDR Radiance HDR Graphics Data
HDR Apollo HDRU
HDR ArcInfo Binary (Environmental Systems Research Institute, Inc. (ESRI))
HDR ArcView Header File (ESRI)
HDR Egret Data File
HDR MicroSim PCBoard Hole-Drill Schedule Report
HDR PC-File+ Database Header
HDR Photoshop (Adobe Systems Incorporated)
HDR Procomm Plus Message Header
HDRU Apollo HDRU
HDS Hierarchical Data System
HDS XMap Hierarchical Dataset (Delorme)
HDV Formula 1 Car Race 2001 Season01 Vehicles Arrows File
HDW Harvard Graphics Draw Vector Graphics (Harvard Graphics)
HDX Help Index
HE5 Hierarchical Data Format Release 5
HEA Fifa 2001 Data Feart Legal Screeen
HEAD Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HEADER Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HEADERS Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HEARTS Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HEARTSSAVE-MS Hearts Saved Game (Microsoft Corporation)
HEAVYSIGH Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HEB DEcomp 3D Scene Data (H|H/G Family of Corporations)
HEC Grafic Pvquan Quant File
HED Hi-Eddi
HED HighEdit Document
HED ReliaSoft RG
HEH Scarlett Expert System Compiler Facts File
HEIDELB Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HEL Hellbender Saved Game (Microsoft Corporation)
HELI RealFlight Radio Control Airplane Description (Knife Edge Software)
HELLFONT Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HELLO Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HELP Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
help UNIX Help File
HELPER Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HELPSCREEN Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HEM HexEdit HexEdit (Expert Commercial Software)
HEP Novell NetWare Help Librarian Data File
HEP HostExplorer Telnet Session Profile (Hummingbird Ltd.)
HER Grafic GIF File
HERALD Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HERBS1 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HERBS2 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HERBS3 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HERBS4 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HERBS5 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HERE Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HERMETICA Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HES Hudson Entertainment Sound
HESSIAN Insight II Hessian File (Accelrys Software Inc.)
HESSIANX Insight II Hessian File (Accelrys Software Inc.)
HEU Adobe FlashPlayer Adobe FlashPlayer Cache MetaData File (Adobe Systems Inc)
HEX SPLITGRADE Upgrade File (Heiland electronic GmbH)
HEX Magellan GPS Receiver Flash Upgrade File (Thales Navigation, Inc.)
HEX Smart Touch Analyze and Retrieve Tool (START) Classic Operator Software Update (HySecurity)
HEX Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HEX Hex Dump
HEX HUGO Game File
HEX Macintosh BinHex 2.0 File
HEY Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HEY2 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HEYCOOLMAN Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
hf UNIX Help File
HFA ERDAS IMAGINE Hierarchical File Architecture (Leica Geosystems , LLC)
HFB Hell Fighter Battle File (David Peterson)
HFB Ralcgm File
HFD HotDocs Form Document (Matthew Bender & Company, a member of the LexisNexis Group)
HFI HP Font Info
HFO Hollywood FX Object File (Pinnacle Systems, Inc.)
HFP Harry's Filters Filter Preset (Harald Heim (The Plugin Site))
HFS Macintosh Disk Image on CD
HFT HotDocs Form Template (Matthew Bender & Company, a member of the LexisNexis Group)
HFT HaftiX Cross-Stitch Pattern (GRZELA Grzegorz Zochowski)
HFV Simulated Macintosh Volumes on PC Hard Drive
HFX HotFax Fax (Smith Micro Software)
HFX US Robotics Rapid Comm Voice Data File
HFX Harvard Graphics F/X File (Harvard Graphics)
HFX Hollywood FX Special Effects File (Pinnacle Systems, Inc.)
HFZ Pinnacle Studio HollywoodFX Plug-In Video Editing File (Pinnacle Systems, Inc.)
HG1 Hellgate: London Saved Game (Flagship Studios, Inc.)
HGC PC Fold Molecule Secondary Structure
HGH PDP-10 High Segment of a Two-Segment Program
HGH Star Wars - Tie Fighter High Score
HGL DN Highlight Groups Definition
HGL HP Graphics Language (Plotter File)
HGP HighGrow (Legal Marijuana Growing Game) Plant File (Slick Software)
HGS HighGrow Virtual Seed File
HGT Shuttle Radar Topography Mission Data (SRTM)
HH C++ Header
HH HammerHead Drumloop File
HH Help Topic Map File
HHA HyperHub Archive (Oracle)
HHC HTML Help Table of Contents (Microsoft Corporation)
HHC TurboTax Contents File (Intuit)
HHH Power C Precompiled Header
HHK HTML Help Index (Microsoft Corporation)
HHL Visual Basic File
HHP HTML Help Workshop Project (Microsoft Corporation)
HHS HyperHub Subkit (Oracle)
HHS HTML Help Samples (Microsoft Corporation)
HHTML Realmedia Adstream HTML File
HI High Scores
HI Spy-CD CD Search Index File
HI1 Spy-CD CD Search Database File
HI2 Spy-CD CD Search Database File
HI4 Spy-CD CD Search Database File
HIA Spy-CD CD Search Database File
HIB Spy-CD CD Search Database File
HIC Spy-CD CD Search Database File
HIC HicEst Script (Georg Petrich, HicEst Instant Prototype Computing)
HID Sony Ericsson Configuration Archive
HIF Quicken On-line File (Intuit Inc.)
HIG High Scores
HIGH Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HIH Spy-CD CD Search Database File
HIHAT Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HIL Hi HelpIndex Language File
HIM Spy-CD CD Search Database File
HIN HyperChem Molecule File (Hypercube, Inc.)
HIN Spy-CD CD Search Database File
HINT Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HINTS Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HINTS2 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HIP Spy-CD CD Search Database File
HIP HiP Compressed File
HIPS Bitmap Graphic
HIQ Spy-CD CD Search Database File
HIR C64 Hires Bitmap Graphic
HIR Hidden Icon Resource
HIR Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HIR2 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HIS SOBEK Simulation History (WL | Delft Hydraulics)
HIS DN History of Executing/Viewing/Editing
HIS Insight II Dynamics Trajectory History File (Accelrys Software Inc.)
HIS Spy-CD CD Search Database File
HIST Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HISTORY Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HIT Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HIT HitPlayer Audio File
HIT Nonags Dialog Killer Data File
HIT The Sims Sound File (Electronic Arts (Maxis))
HIV RegShot Registry Hive File (TiANWEi)
HIV Windows NT Registry Hive (Microsoft Corporation)
HIV W32/SillyFDC-AS
HIW Spy-CD CD Search Database File
HIX System SYSUTIL File
HIZ Spy-CD CD Search Database File
HJT TreePad Hypertext Database File (Freebyte)
HK5 ACT! Database File (Best Software CRM Division)
HKC HTML-KIT Auto Complete Short-cuts
HKI WinHki Compressed Archive (Hanspeter Imp)
HKI1 WinHki Compressed File
HKI2 WinHki Compressed File
HKI3 WinHki Compressed File
HKS HTML-Kit Plug-in (HTML-Kit.com)
HKT egseing RB HK Data
HL$ Compressed DOS Help File (Microsoft Corporation)
HLB VAX Help Library
HLD Structural Desktop Saved Data (Hold File) (Structural Desktop, Inc.)
HLF FAR Manager Help File (FAR Group)
HLF BASIC QuickBAS QuickB01 File
HLI MOJO 620 Logo (TDK)
HLL Boulderdash Game File
HLM Winhelp Vbhilfe File
HLN MicroStation Hidden Line File (Bentley Systems, Incorporated)
HLP HP-95LX Help File
HLP Stata Statistical Software Help File (Stata Corporation)
HLP Windows Help File (Microsoft Corporation)
hlp UNIX Help File
HLP Advisor Help File (Microsoft Corporation)
HLP Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HLX Hollex Cartridge Atari Cartridge Image File
HLX ATI Radeon Video Driver Support File
HLX Hyperlatex File
HLX Multi-Edit Help File
HLX Visual C++ Syntax Coloring Instructions (Microsoft Corporation)
HLX Help Magician Help Text File (Software Interphase, Inc.)
HLZ Multi-Edit Packed Help File
HM Windows Help Context IDs used by MAKEHM.EXE.
HM Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HM2 Help & Manual Ver 2 Help File Project (EC Software GmbH)
HM3 Help & Manual Ver 3 Help File Project (EC Software GmbH)
HMA ATRAC3plus Encoded Audio File (Sony)
HME Smartphone Theme File
HMF HOOPS Metafile (Tech Soft America)
HMI Descent Human Machine Interfaces MIDI File
HMK Hallmark Card Studio File (Creative Home)
HMM Procomm Plus Alternate Mail Read Option Menu
HMP Descent Human Machine Interfaces MIDI File
HMP Help Magician Help Project File (Software Interphase, Inc.)
HMP Technics Sx KN 6000 Keyboard Home Page File
HMP 3D GameStudio Terrain Entity (Conitec Datasystems, Inc)
HMP Frontier: First Encounters Music File
HMR GeoTIFF Bitmap File (Bentley Systems, Incorporated)
HMS HMS Archiware File
HMS MS SMS Inventory File
HMS Stentura 8000 or Stentura 8000LX Deposition File
HMSKIN Help & Manual Ver 5 Help File Skin (EC Software GmbH)
HMT HighMAT (Microsoft Corporation)
HMW Homeword for DeskMate
HMX Help & Manual Ver 4 Help File Project (EC Software GmbH)
HMX MixlleniumEngine (Haydee) Web Server Module Template File
HMXP Help & Manual Ver 5 Help File Uncompressed XML Project (EC Software GmbH)
HMXZ Help & Manual Ver 5 Help File Compressed XML Project (EC Software GmbH)
HM~ Help&Manual Backup Help File Project
HNC CNC Program File Heidenhain Dialog
HNC NoteCenter Note File (Domas Savickas)
HND Hallo Northern Sky (HNSKY) Deep Sky Database File (Han Kleijn)
HND HelpNDoc Project File (IBE Software)
HNE NoteCenter Encrypted Note File (Domas Savickas)
HNF Humax Receiver Settings
HNS Hallo Northern Sky (HNSKY) Settings (Han Kleijn)
HNV TheWord & Bible Companion Hebrew Names Version Bible
HO Knowledge Explorer Knowledge Representation Hierarchy Outline
HO Magix Music/Video
HO Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HOB Star Trek: Birth of the Federation Ship Graphic (Atari)
HOC High Octane Race Course (Fishstick Games)
HOCKEY Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HOD Homeworld Hardpoint/Object Data (Sierra Entertainment, Inc.)
HOF Hall Of Fame
HOG Descent Mission File
HOG Lucas Arts Dark Forces WAD File
HOL Personal Paint Dutch Language User Interface File (Amiga)
HOLES Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HOLLY Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HOME Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HOME1 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HOME2 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HOOD Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HOP Hippon Protected File (Hippon SAS)
HOR Horoscope
HORIZON1 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HORIZON2 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HORN Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HORNPIPE Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HOT eFax Messenger Fax (j2 Global Communications, Inc.)
HOT Mosaic Internet Address
HOT The Sims Sound File (Electronic Arts (Maxis))
HOTFONT Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HOTSPOT Homeworld Cursor Informaiton (Sierra Entertainment, Inc.)
HOW Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HP HP Graphics Language (Plotter)
HP Thor Database Primary Hash File
HP$ NTgraph Visual C Wizzard File
HP- HP Distribution Binary File
HP-UX HP-UNIX File
HP8 HP NewWave Write ASCII Roman8 Character Set
HP? LoseThos C+ Header File (Terry A. Davis)
HPD Harry Potter Related
HPD HotDocs PDF Document (Matthew Bender & Company, a member of the LexisNexis Group)
HPD HP Document (Hewlett-Packard Development Company, L.P.)
HPF NetHelp2 Project File (Netscape)
HPF HotLine Partial Download File
HPF PageMaker HP LaserJet Font (Adobe Systems Incorporated)
HPG HP Graphics Language (Plotter)
HPG Hide Photos Encrypted Photo Container (Bolide Software)
HPGL HP Graphics Language (Plotter)
HPH Designer Graphics System2 File
HPI GEM Font Information
HPI Hemera Photo-Object Image (Hemera Technologies Inc.)
HPI Total Annihilation Saved Game
HPIC Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HPJ Help Project File
HPJ HP LaserJet Print-to-File
HPJ Visual Basic Help Project
HPK Compressed Archive
HPK HPXUpgrade Service Pack Fileset (Haliplex Communication Systems)
HPL HP Graphics File
HPLJ Hewlett-Packerd LaserJet Vector Image
HPM HP NewWave Emm Text
HPM Procomm Plus Alternate Main Menu for Privileged Users
HPM Procomm Plus Alternative Menu
HPM Quaestor 1.x High Performance Map
HPP C++ Builder 6 Program Header (Borland Software Corporation)
HPP C++ Program Header
HPP Printer Control Language Vector Image (Hewlett-Packard)
HPP InfoMgr Database File (RESystems, Inc.)
HPP Zortech C++ Header
HPP Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HPPCL Hewlett-Packard Printer Control Language Vector Image
HPR RoboHELP Configuration File
HPR ATLAS.ti 4.x Project File (Scientific Software Development)
HPR5 ATLAS.ti 5.0 Project File (Scientific Software Development)
HPRJ Heroglyph Project File (proDAD GmbH)
HPRT Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HPS HP HPS Digital Sender Information (Hewlett-Packard Development Company, L.P.)
HPT HotDocs PDF Template (Matthew Bender & Company, a member of the LexisNexis Group)
HPUX HP-UNIX File
HPW CompuServe Home Page Wizard
HPW HP Word Document (Hewlett-Packard Development Company, L.P.)
HP_ Winhelp Compressed File
HP~ V-help File
HQP CP/M Disc Utility Information
hqx Macintosh BinHex 4 Compressed Archive
HR TRS 80 Graphic
HR2 Curious Labs Poser Hair File
HR5 Heredis 2000 Family History File (BSD CONCEPT)
HRC SoftImage Model Geometry File
HRF Hitachi Raster Format Graphic
HRH C++ and Resources Common Header
HRL Herolab EasyWin32
HRM Netmino File
HRM Procomm Plus Alternate Main Menu
HRP AviSys Bird Watcher Database (Jerry Blinn)
HRP Handy Recovery Recovered Partion Information (SoftLogica LLC.)
HRT Hornet Packer Module/Song
HRU HRU Bitmap
HRV Personal Paint Croatian Language User Interface File (Amiga)
HRX Herolab EasyWin32
HRZ Slow Scan Television (SSTV)
HS Hugs Source Code
HS Literate Haskell Source Code File
HS HSnapshot Screen Snapshot (PCNetWork)
HS RAZR Flex File (Motorola, Inc.)
HS2 HyperRESEARCH (ResearchWare, Inc.)
HS2 Postering Monochrome Image
HS3 HyperRESEARCH (ResearchWare, Inc.)
HSA Hagaki Studio Address Book (Microsoft Corporation)
HSB HALion Sampler File (Steinberg Media Technologies GmbH.)
HSB HandStory Suite eBook File (SJ NAMO, Inc.)
HSBOY Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HSC HYSYS Simulation (Aspen Technology, Inc.)
HSC HelpScribble Project Source (JGsoft - Just Great Software)
HSC HSC Tracker 2-op FM Music File
HSD HSD+CP Aero-HSD Configuration File (Thrane & Thrane)
HSD Hagaki Studio Document (Microsoft Corporation)
HSE Dreamweaver Snippet
HSF HOOPS Stream File (Tech Soft America)
HSF Lizard Protector Web Content Security Protected Web Content (LockLizard Limited)
HSH IIS NNTP Hash File (Microsoft Corporation)
HSI Handmade Software Graphic File
HSI HSI JPEG Bitmap
HSK Nimbus 7 SAMS Data File
HSM Assembly Language Header - University of Waterloo Engineering Convention
HSM The Sims Sound File (Electronic Arts (Maxis))
HSP HomeSite WWW Page Project
HSP HSC Packed
HSQ CAST Application Mining Suite
HSQ Data File Associated with Qaz Trojan
HSR RezeptAssist Import and Export File
HSR Hero Screen Recorder Screen Capture File (Beijing Herosoft Zongheng Network Technology Co., Ltd)
HSS Dreamweaver Snippet
HSS Photoshop Hue/Saturation Information (Adobe Systems Incorporated)
HST Corel QuickCorrect and Speller History File
HST WordPerfect (Corel Corporation)
HST History File
HST Host File
HST Image Alchemy Handmade Software Graphics Histogram
HST Netscape History File
HST Procomm Plus History File
HST Symantec Anti-Virus Live Update File (Symantec Corporation)
HST Yahoo! Instant Messenger History
HST VGA Planets Game File (Tim Wisseman)
HSX Health and Safety Xpert Project (HBXL Construction Software)
HSZ Handyscript Skin (Ventris, Inc.)
HT HyperTerminal Data File (Hilgraeve Inc.)
HT BrailleNote Visual Display File (Pulse Data International Ltd.)
HT Browser Html Template (TechSoft)
HT3 HTML File
HTA Hemera Thumbnail Archive (Hemera Technologies Inc.)
HTA Hypertext Application
HTA Tonline BSW4 File
HTACCESS Apache Access Configuration
HTB HttpBrowser Database File
HTC HTML Component
HTD HyperTRANSCRIBE Project File (ResearchWare, Inc.)
HTF HTF Sounding File
HTF Virtual Hypertext Font
HTF WebBase File
HTI WebBase File
HTI Win Help Related File
HTM Hypertext Markup Language
HTMENX egis Encrypted HTM File (HiTRUST Inc.)
HTML Hypertext Markup Language
HTML Mozilla (Netscape) Bookmark File (Mozilla.org)
HTMLENX egis Encrypted HTML File (HiTRUST Inc.)
HTMLS Server-side HTML File
HTN Micrografx Picture Publisher 8 printstyles file
HTP honestech Video Editor Project File (Honest Technology,)
HTR People Putty Haptek Character (Haptek, Inc.)
HTR Motion Analysis Software Skeletal File
HTRI HTRI Xchanger Suite Data Input File (Heat Transfer Research, Inc.)
HTS Troj/DelSpy-E
HTT Hypertext Template File (Microsoft Corporation)
HTX Extended Hypertext Template
HTX MS FrontPage Database Results HTML-like query script.
HTX Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HTZ HTML Editor Archive
HU Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HUD HUD Maker File (Radio Tree Productions, Inc.)
HUF Huffman Encoded/Compressed File
HUH HydroCAD Stormwater Modeling System Unit Hydrograph (HydroCAD Software Solutions LLC)
HULL Halflife Map Collision Hull File
HUN Dataview File
HUN Personal Paint Hungarian Language User Interface File (Amiga)
HUS Husqvarna Designer Embroidery Machine Format (Husqvarna Viking)
HUY Eto Dlia Vas
HVA Tiberian Sun Voxel Animation Control File (TiberiumSun.com)
HVD HoverDesk Theme File (Hover Inc.)
HVD chosenOS HoverNews Skin File
HVD CMT Surveyor's Assistant 1.x/2.0x Job
HVD HerdView Event Data File
HVD ISIS Hviews File
HVX LightWave 3D Hypervoxel (NewTek)
HW Stanford University EPGY Homework
HWCFG VersaPro Hardware Configuration File
HWD Hollywood Presentation File
HWL Corel Shared Writing Tools 9.0 File
HWL Hangman Deluxe Word List
HWL HttpWatch HTTP Watch Log (Simtec Limited)
HWM Hillwalker/MapWise/Alpiniste/PhotoMaps Own Raster Map Parameters (ISYS Computers)
HWP Hangul Word Processor File (Haansoft)
HWPROJ Visual Studio .NET Help Project (Microsoft Corporation)
HWR Hillwalker/MapWise/Alpiniste/PhotoMaps ISYS Route Card (ISYS Computers)
HX SurRender3D Database File
HX haXe Source Code (Motion-Twin)
HX EARS Component File
HX THOR Database Cross-reference Hash File
HXC Help 2 Project/Collection File (Microsoft Corporation)
HXCONV Huelix Audio Converter Session Information (Huelix Solutions Private Ltd)
HXD Help 2 Validator File (Microsoft Corporation)
HXF Help 2 Include File (Microsoft Corporation)
HXG Help 2 Filter Cache (Microsoft Corporation)
HXH Help 2 Merged Hierarchy (Microsoft Corporation)
HXI Help 2 Compiled Help File (Microsoft Corporation)
HXK Help 2 Keyword Index (Microsoft Corporation)
HXK Help TOC/Index File
HXL Help 2 Registered Namespaces List (Microsoft Corporation)
HXM Descent2 HAM File
HXM Procomm Plus Alternate Protocol Selection Menu for All Users
HXML haXe Make File (Motion-Twin)
HXS Help 2 Compiled Help File (Microsoft Corporation)
HXT Help TOC/Index File
HXT Help 2 Table of Contents (Microsoft Corporation)
HXV Help 2 Virtual Topic Definition (Microsoft Corporation)
HXW Help 2 Merged Keyword Index (Microsoft Corporation)
HXX C++ Header
HX_ C Poet Compressed Disk1 File
HY1 Ventura Publisher Hyphenation Algorithm
HY2 Ventura Publisher Hyphenation Algorithm
HYC WordPerfect Hyphenation File (Corel Corporation)
HYD WordPerfect for Windows Hyphenation Dictionary (Corel Corporation)
HYM Scandata 3D Scanner File (Hymarc, Inc.)
HYP Acrobat Spelling File (Adobe Systems Incorporated)
HYP Hyper Compressed Archive
HYP Atari ST Guide Hypertext Document
HYP Hyphenation File
HYPERCARD Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HYPERXCMD Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HYPHENATOR Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
HYS Globe HySales Client File (Globe Interactive)
HYS Smart Touch Analyze and Retrieve Tool (START) New Generation Operator Software Update (HySecurity)
HYS TriboIndenter Air Indent Electrostatic Force Constant Setting (Hysitron Incorporated)
HYS Multi-Parametric Toolbox HYSDEL File (Eidgenössische Technische Hochschule Zürich)
HZ Chinese Text
HZF Neosat Fixes (Neosat USA)
HZF Home Inspector Pro Client Inspection (Home Inspection Software)
HZO CrossWorks Object File (Rowley Associates Limited)
hzp Hazard Manager Document (APPinspect inc.)
HZX CrossWorks Executable File (Rowley Associates Limited)
H_ Winhelp Compressed File
H__ C++ Header Seldom used C++ Header (same as H++ and H)

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