| Extension | File Description |
| .OFP | Uncommon Files |
| .OFQ | Uncommon Files |
| .OFR | Misc Files |
| .OFS | Uncommon Files |
| .OFT | Data Files |
| .OFU | Uncommon Files |
| .OFV | Uncommon Files |
| .OFW | Uncommon Files |
| .OFX | Data Files |
| .OFY | Uncommon Files |
| .OFZ | Uncommon Files |
| .OG0 | Uncommon Files |
| .OG1 | Uncommon Files |
| .OG2 | Uncommon Files |
| .OG3 | Uncommon Files |
| .OG4 | Uncommon Files |
| .OG5 | Uncommon Files |
| .OG6 | Uncommon Files |
| .OG7 | Uncommon Files |
| .OG8 | Uncommon Files |
| .OG9 | Uncommon Files |
| .OGA | Audio Files |
| .OGB | Uncommon Files |
| .OGC | Uncommon Files |
| .OGD | Uncommon Files |
| .OGE | Uncommon Files |
| .OGF | 3D Image Files |
| .OGF2 | Uncommon Files |
| .OGF3 | Uncommon Files |
| .OGG | Audio Files |
| .OGH | Uncommon Files |
| .OGI | Uncommon Files |
| .OGJ | Uncommon Files |
| .OGK | Uncommon Files |
| .OGL | Uncommon Files |
| .OGM | Video Files |
| .OGN | Uncommon Files |
| .OGNC | Web Files |
| .OGO | Uncommon Files |
| .OGP | Uncommon Files |
| .OGQ | Uncommon Files |
| .OGR | Uncommon Files |
| .OGS | Data Files |
| .OGT | Uncommon Files |
| .OGU | Uncommon Files |
| .OGV | Video Files |
| .OGW | Uncommon Files |
| .OGX | Video Files |
| .OGY | Uncommon Files |
| .OGZ | Uncommon Files |
| .OH | Uncommon Files |
| .OH0 | Uncommon Files |
| .OH1 | Uncommon Files |
| .OH2 | Uncommon Files |
| .OH3 | Uncommon Files |
| .OH4 | Uncommon Files |
| .OH5 | Uncommon Files |
| .OH6 | Uncommon Files |
| .OH7 | Uncommon Files |
| .OH8 | Uncommon Files |
| .OH9 | Uncommon Files |
| .OHA | Uncommon Files |
| .OHB | Uncommon Files |
| .OHC | Uncommon Files |
| .OHD | Uncommon Files |
| .OHE | Uncommon Files |
| .OHF | Uncommon Files |
| .OHG | Uncommon Files |
| .OHH | Uncommon Files |
| .OHI | Uncommon Files |
| .OHJ | Uncommon Files |
| .OHK | Uncommon Files |
| .OHL | Uncommon Files |
| .OHM | Uncommon Files |
| .OHN | Uncommon Files |
| Extension | File Description |
| .OHO | Uncommon Files |
| .OHP | Uncommon Files |
| .OHQ | Uncommon Files |
| .OHR | Uncommon Files |
| .OHS | Uncommon Files |
| .OHSD | Uncommon Files |
| .OHT | Uncommon Files |
| .OHU | Uncommon Files |
| .OHV | Uncommon Files |
| .OHW | Uncommon Files |
| .OHX | Uncommon Files |
| .OHY | Uncommon Files |
| .OHZ | Uncommon Files |
| .OI0 | Uncommon Files |
| .OI1 | Uncommon Files |
| .OI2 | Uncommon Files |
| .OI3 | Uncommon Files |
| .OI4 | Uncommon Files |
| .OI5 | Uncommon Files |
| .OI6 | Uncommon Files |
| .OI7 | Uncommon Files |
| .OI8 | Uncommon Files |
| .OI9 | Uncommon Files |
| .OIA | Uncommon Files |
| .OIB | Uncommon Files |
| .OIC | Uncommon Files |
| .OID | Uncommon Files |
| .OIE | Uncommon Files |
| .OIF | Uncommon Files |
| .OIG | Uncommon Files |
| .OIH | Uncommon Files |
| .OII | Uncommon Files |
| .OIJ | Uncommon Files |
| .OIK | Uncommon Files |
| .OIL | Uncommon Files |
| .OIM | Uncommon Files |
| .OIN | Uncommon Files |
| .OIO | Uncommon Files |
| .OIP | Uncommon Files |
| .OIQ | Uncommon Files |
| .OIR | Uncommon Files |
| .OIS | Uncommon Files |
| .OIT | Uncommon Files |
| .OIU | Uncommon Files |
| .OIV | Uncommon Files |
| .OIW | Uncommon Files |
| .OIX | Uncommon Files |
| .OIY | Uncommon Files |
| .OIZ | Uncommon Files |
| .OJ0 | Uncommon Files |
| .OJ1 | Uncommon Files |
| .OJ2 | Uncommon Files |
| .OJ3 | Uncommon Files |
| .OJ4 | Uncommon Files |
| .OJ5 | Uncommon Files |
| .OJ6 | Uncommon Files |
| .OJ7 | Uncommon Files |
| .OJ8 | Uncommon Files |
| .OJ9 | Uncommon Files |
| .OJA | Uncommon Files |
| .OJB | Uncommon Files |
| .OJC | Uncommon Files |
| .OJD | Uncommon Files |
| .OJE | Uncommon Files |
| .OJF | Uncommon Files |
| .OJG | Uncommon Files |
| .OJH | Uncommon Files |
| .OJI | Uncommon Files |
| .OJJ | Uncommon Files |
| .OJK | Uncommon Files |
| .OJL | Uncommon Files |
| .OJM | Uncommon Files |
| .OJN | Uncommon Files |
| .OJO | Uncommon Files |
| .OJP | Uncommon Files |
