| Extension | File Description |
| .HNX | Uncommon Files |
| .HNY | Uncommon Files |
| .HNZ | Uncommon Files |
| .HO | Uncommon Files |
| .HO0 | Uncommon Files |
| .HO1 | Uncommon Files |
| .HO2 | Uncommon Files |
| .HO3 | Uncommon Files |
| .HO4 | Uncommon Files |
| .HO5 | Uncommon Files |
| .HO6 | Uncommon Files |
| .HO7 | Uncommon Files |
| .HO8 | Uncommon Files |
| .HO9 | Uncommon Files |
| .HOA | Uncommon Files |
| .HOB | Uncommon Files |
| .HOC | Uncommon Files |
| .HOCKEY | Uncommon Files |
| .HOD | Uncommon Files |
| .HOE | Uncommon Files |
| .HOF | Uncommon Files |
| .HOH | Uncommon Files |
| .HOI | Uncommon Files |
| .HOJ | Uncommon Files |
| .HOK | Uncommon Files |
| .HOLES | Uncommon Files |
| .HOLLY | Uncommon Files |
| .HOM | Uncommon Files |
| .HOME | Uncommon Files |
| .HOME1 | Uncommon Files |
| .HOME2 | Uncommon Files |
| .HON | Uncommon Files |
| .HOO | Uncommon Files |
| .HOOD | Uncommon Files |
| .HOP | Uncommon Files |
| .HOQ | Uncommon Files |
| .HOR | Uncommon Files |
| .HORIZON1 | Uncommon Files |
| .HORIZON2 | Uncommon Files |
| .HORN | Uncommon Files |
| .HORNPIPE | Uncommon Files |
| .HOS | Uncommon Files |
| .HOTFONT | Uncommon Files |
| .HOTSPOT | Uncommon Files |
| .HOU | Uncommon Files |
| .HOV | Uncommon Files |
| .HOW | Uncommon Files |
| .HOX | Uncommon Files |
| .HOY | Uncommon Files |
| .HOZ | Uncommon Files |
| .HP | Uncommon Files |
| .HP$ | Uncommon Files |
| .HP- | Uncommon Files |
| .HP-UX | Uncommon Files |
| .HP0 | Uncommon Files |
| .HP1 | Uncommon Files |
| .HP2 | Uncommon Files |
| .HP3 | Uncommon Files |
| .HP4 | Uncommon Files |
| .HP5 | Uncommon Files |
| .HP6 | Uncommon Files |
| .HP7 | Uncommon Files |
| .HP8 | Uncommon Files |
| .HP9 | Uncommon Files |
| .HPA | Uncommon Files |
| .HPB | Uncommon Files |
| .HPC | Uncommon Files |
| .HPE | Uncommon Files |
| .HPH | Uncommon Files |
| .HPIC | Uncommon Files |
| .HPLJ | Uncommon Files |
| .HPM | Uncommon Files |
| .HPN | Uncommon Files |
| .HPO | Uncommon Files |
| .HPPCL | Uncommon Files |
| Extension | File Description |
| .HPQ | Uncommon Files |
| .HPR | Uncommon Files |
| .HPR5 | Uncommon Files |
| .HPRJ | Uncommon Files |
| .HPRT | Uncommon Files |
| .HPU | Uncommon Files |
| .HPUX | Uncommon Files |
| .HPV | Uncommon Files |
| .HPW | Uncommon Files |
| .HPX | Uncommon Files |
| .HPY | Uncommon Files |
| .HPZ | Uncommon Files |
| .HP_ | Uncommon Files |
| .HP~ | Uncommon Files |
| .HQ0 | Uncommon Files |
| .HQ1 | Uncommon Files |
| .HQ2 | Uncommon Files |
| .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 |
| .HR0 | Uncommon Files |
| .HR1 | Uncommon 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 |
| .HRG | Uncommon Files |
| .HRH | Uncommon Files |
| .HRI | Uncommon Files |
| .HRJ | Uncommon Files |
| .HRK | Uncommon Files |
| .HRM | Uncommon Files |
| .HRN | Uncommon Files |
| .HRO | Uncommon Files |
| .HRP | Uncommon Files |
| .HRQ | Uncommon Files |
| .HRR | Uncommon Files |
