| hl_ | Compressed HLP File |
| hm4 | Lorex Client Backup Data |
| hma | IBM HATS Macro Data |
| hmax | Autodesk 3D Studio Max Custom Data |
| hmb | SPEEDTRONIC Mark IV HMI Bridge |
| hmc | HAMIC Data |
| hmc | hyperCAD-S Model Data |
| hmd | SWAT Relative Humidity Input Data |
| hmdl | Humus 3D Model Data |
| hme | Smartphone Home Screen Theme |
| hmf | ANSYS Fluent Metafile |
| hmf | HOOPS Metafile |
| hmg | modhmm HMG model |
| hmgd | Microsoft Office Grammar Data |
| hmhd | Microsoft Word for Mac Hyphenation Data |
| hml | Hangul Word Processor Markup Language v2 Data |
| hml | Thinkfree Office NEO XML Document |
| hmm | HMMER Data |
| hmmer | SAM HMMER-format Model |
| hmmr | SAM HMMER-format Model |
| hmo | ROXIE Mesh Information |
| hmp | HAHTsite Dynamic Server-side Image Map |
| hmr | Inertial Explorer Heading Data |
| hmr | WaterGEMS Transient Analysis Results Data |
| hmrep | hyperMILL CAM Geometry Data |
| hms | Stentura 8000 Deposition Data |
| hms | WRAP HYD Message Data |
| hmskin | Help and Manual Skin Data |
| hmt | HighMAT File |
| hmx | Haydee Web Server Module Template |
