| Extension | File Description |
| .HQ3 | Uncommon Files |
| .HQ4 | Uncommon Files |
| .HQ5 | Uncommon Files |
| .HQ6 | Uncommon Files |
| .HQ7 | Uncommon Files |
| .HQ8 | Uncommon Files |
| .HQ9 | Uncommon Files |
| .HQA | Uncommon Files |
| .HQB | Uncommon Files |
| .HQC | Uncommon Files |
| .HQD | Uncommon Files |
| .HQE | Uncommon Files |
| .HQF | Uncommon Files |
| .HQG | Uncommon Files |
| .HQH | Uncommon Files |
| .HQI | Uncommon Files |
| .HQJ | Uncommon Files |
| .HQK | Uncommon Files |
| .HQL | Uncommon Files |
| .HQM | Uncommon Files |
| .HQN | Uncommon Files |
| .HQO | Uncommon Files |
| .HQP | Uncommon Files |
| .HQQ | Uncommon Files |
| .HQR | Uncommon Files |
| .HQS | Uncommon Files |
| .HQT | Uncommon Files |
| .HQU | Uncommon Files |
| .HQV | Uncommon Files |
| .HQW | Uncommon Files |
| .hqx | Uncommon Files |
| .HQY | Uncommon Files |
| .HQZ | Uncommon Files |
| .HR | Raster Image Files |
| .HR0 | Uncommon Files |
| .HR1 | Uncommon Files |
| .HR2 | 3D Image Files |
| .HR3 | Uncommon Files |
| .HR4 | Uncommon Files |
| .HR5 | Uncommon Files |
| .HR6 | Uncommon Files |
| .HR7 | Uncommon Files |
| .HR8 | Uncommon Files |
| .HR9 | Uncommon Files |
| .HRA | Uncommon Files |
| .HRB | Uncommon Files |
| .HRC | Uncommon Files |
| .HRD | Uncommon Files |
| .HRE | Uncommon Files |
| .HRF | Raster Image Files |
| .HRG | Uncommon Files |
| .HRH | Uncommon Files |
| .HRI | Uncommon Files |
| .HRJ | Uncommon Files |
| .HRK | Uncommon Files |
| .HRL | Developer Files |
| .HRM | Uncommon Files |
| .HRN | Uncommon Files |
| .HRO | Uncommon Files |
| .HRP | Uncommon Files |
| .HRQ | Uncommon Files |
| .HRR | Uncommon Files |
| .HRS | Uncommon Files |
| .HRT | Uncommon Files |
| .HRU | Uncommon Files |
| .HRV | Uncommon Files |
| .HRW | Uncommon Files |
| .HRX | Uncommon Files |
| .HRY | Uncommon Files |
| .HRZ | 3D Image Files |
| .HS | Misc Files |
| .HS0 | Uncommon Files |
| .HS1 | Uncommon Files |
| .HS2 | Data Files |
| .HS3 | Uncommon Files |
| Extension | File Description |
| .HS4 | Uncommon Files |
| .HS5 | Uncommon Files |
| .HS6 | Uncommon Files |
| .HS7 | Uncommon Files |
| .HS8 | Uncommon Files |
| .HS9 | Uncommon Files |
| .HSA | Uncommon Files |
| .HSB | Audio Files |
| .HSBOY | Uncommon Files |
| .HSC | Uncommon Files |
| .HSD | Uncommon Files |
| .HSE | Uncommon Files |
| .HSF | CAD Files |
| .HSG | Uncommon Files |
| .HSH | System Files |
| .HSI | Uncommon Files |
| .HSJ | Uncommon Files |
| .HSK | Data Files |
| .HSL | Uncommon Files |
| .HSM | Uncommon Files |
| .HSN | Uncommon Files |
| .HSO | Uncommon Files |
| .HSP | Uncommon Files |
| .HSQ | Uncommon Files |
| .HSR | Uncommon Files |
| .HSS | Uncommon Files |
| .HST | Data Files |
| .HSU | Uncommon Files |
| .HSV | Uncommon Files |
| .HSW | Uncommon Files |
| .HSX | Uncommon Files |
| .HSY | Uncommon Files |
| .HSZ | Uncommon Files |
| .HT | Settings Files |
| .HT0 | Uncommon Files |
| .HT1 | Uncommon Files |
| .HT2 | Uncommon Files |
| .HT3 | Uncommon Files |
| .HT4 | Uncommon Files |
| .HT5 | Uncommon Files |
| .HT6 | Uncommon Files |
| .HT7 | Uncommon Files |
| .HT8 | Uncommon Files |
| .HT9 | Uncommon Files |
| .HTA | Executable Files |
| .HTACCESS | Web Files |
| .HTB | Data Files |
| .HTC | Web Files |
| .HTD | Uncommon Files |
| .HTE | Uncommon Files |
| .HTF | Uncommon Files |
| .HTG | Uncommon Files |
| .HTH | Uncommon Files |
| .HTI | Uncommon Files |
| .HTJ | Uncommon Files |
| .HTK | Uncommon Files |
| .HTKE | Data Files |
| .HTL | Uncommon Files |
| .HTM | Web Files |
| .HTMENX | Uncommon Files |
| .HTML | Web Files |
| .HTMLENX | Uncommon Files |
| .HTMLS | Uncommon Files |
| .HTMLX | Web Files |
| .HTN | Uncommon Files |
| .HTO | Uncommon Files |
| .HTP | Uncommon Files |
| .HTQ | Uncommon Files |
| .HTR | Uncommon Files |
| .HTRI | Uncommon Files |
| .HTS | Uncommon Files |
| .HTT | System Files |
| .HTU | Uncommon Files |
| .HTV | Uncommon Files |
| .HTW | Uncommon Files |
