| hr2 | Poser Hair Data |
| hrb | TIBCO Hawk Rulebase Data |
| hrc | AQUA Hydrogen Bond Distance Restraints Counts Data |
| hrc | Softimage 3D Model |
| hrd | MSC Patran Device-dependent Hardcopy Output File |
| hrm | Polar Heart Rate Monitor Data |
| hrm | Procomm Plus Alternate Menu |
| hrp | AviSys Bird Watcher Database |
| hrp | HAHTsite Referred Project Information |
| hrr | WRAP Hydropower and Reservoir Release Data |
| hrs | HRS Pro NAUPA II File |
| hru | SWAT HRU Data |
| hrv | AQUA Hydrogen Bond Distance Restraints Violations Data |
| hrv | HRVTool Data |
| hrz | Poser Compressed Hair Data |
| hs2 | HyperRESEARCH 2 Study |
| hs3 | HyperRESEARCH 3 Study |
| hs6lic | HyperSnap License Data |
| hs7lic | HyperSnap License Data |
| hs8lic | HyperSnap 8 License Data |
| hsa | Hagaki Studio Address Book |
| hsancillary | Mac OS X Finder Data |
| hsc | Aspen HYSYS Simulation |
| hsc | IBM HATS Screen Capture Data |
| hscx | HemoSpat Coordinate Exchange Format Data |
| hsh | Microsoft IIS Metabase Hash File |
| hsh | Microsoft Surface Calibration Hash |
| hsh | Microsoft Windows Catalog Search Index Hash |
| hsk | Nimbus 7 SAMS HSK Data |
| hskat | Knowledge Master Data |
| hsl | Hex Workshop Structure Library |
| hsm | AQUA Hydrogen Bond Distance Restraints Summary Data |
| hsn | HostScan Hosts Data |
| hsp | iGO Primo Histspeed File |
| hsql | SAS/IntrNet htmSQL Data |
