| Extension | File Description |
| .O | Developer Files |
| .O$$ | Uncommon Files |
| .O00 | Uncommon Files |
| .O01 | Uncommon Files |
| .O02 | Uncommon Files |
| .O03 | Uncommon Files |
| .O04 | Uncommon Files |
| .O05 | Uncommon Files |
| .O06 | Uncommon Files |
| .O07 | Uncommon Files |
| .O08 | Uncommon Files |
| .O09 | Uncommon Files |
| .O0A | Uncommon Files |
| .O0B | Uncommon Files |
| .O0C | Uncommon Files |
| .O0D | Uncommon Files |
| .O0E | Uncommon Files |
| .O0F | Uncommon Files |
| .O0G | Uncommon Files |
| .O0H | Uncommon Files |
| .O0I | Uncommon Files |
| .O0J | Uncommon Files |
| .O0K | Uncommon Files |
| .O0L | Uncommon Files |
| .O0M | Uncommon Files |
| .O0N | Uncommon Files |
| .O0O | Uncommon Files |
| .O0P | Uncommon Files |
| .O0Q | Uncommon Files |
| .O0R | Uncommon Files |
| .O0S | Uncommon Files |
| .O0T | Uncommon Files |
| .O0U | Uncommon Files |
| .O0V | Uncommon Files |
| .O0W | Uncommon Files |
| .O0X | Uncommon Files |
| .O0Y | Uncommon Files |
| .O0Z | Uncommon Files |
| .O1 | Uncommon Files |
| .O10 | Uncommon Files |
| .O11 | Uncommon Files |
| .O12 | Uncommon Files |
| .O13 | Uncommon Files |
| .O14 | Uncommon Files |
| .O15 | Uncommon Files |
| .O16 | Uncommon Files |
| .O17 | Uncommon Files |
| .O18 | Uncommon Files |
| .O19 | Uncommon Files |
| .O1A | Uncommon Files |
| .O1B | Uncommon Files |
| .O1C | Uncommon Files |
| .O1D | Uncommon Files |
| .O1E | Uncommon Files |
| .O1F | Uncommon Files |
| .O1G | Uncommon Files |
| .O1H | Uncommon Files |
| .O1I | Uncommon Files |
| .O1J | Uncommon Files |
| .O1K | Uncommon Files |
| .O1L | Uncommon Files |
| .O1M | Uncommon Files |
| .O1N | Uncommon Files |
| .O1O | Uncommon Files |
| .O1P | Uncommon Files |
| .O1Q | Uncommon Files |
| .O1R | Uncommon Files |
| .O1S | Uncommon Files |
| .O1T | Uncommon Files |
| .O1U | Uncommon Files |
| .O1V | Uncommon Files |
| .O1W | Uncommon Files |
| .O1X | Uncommon Files |
| .O1Y | Uncommon Files |
| .O1Z | Uncommon Files |
| Extension | File Description |
| .O20 | Uncommon Files |
| .O21 | Uncommon Files |
| .O22 | Uncommon Files |
| .O23 | Uncommon Files |
| .O24 | Uncommon Files |
| .O25 | Uncommon Files |
| .O26 | Uncommon Files |
| .O27 | Uncommon Files |
| .O28 | Uncommon Files |
| .O29 | Uncommon Files |
| .O2A | Uncommon Files |
| .O2B | Uncommon Files |
| .O2C | Uncommon Files |
| .O2D | Uncommon Files |
| .O2E | Uncommon Files |
| .O2F | Uncommon Files |
| .O2G | Uncommon Files |
| .O2H | Uncommon Files |
| .O2I | Uncommon Files |
| .O2J | Uncommon Files |
| .O2K | Uncommon Files |
| .O2L | Uncommon Files |
| .O2M | Uncommon Files |
| .O2N | Uncommon Files |
| .O2O | Uncommon Files |
| .O2P | Uncommon Files |
| .O2Q | Uncommon Files |
| .O2R | Uncommon Files |
| .O2S | Uncommon Files |
| .O2T | Uncommon Files |
| .O2U | Uncommon Files |
| .O2V | Uncommon Files |
| .O2W | Uncommon Files |
| .O2X | Uncommon Files |
| .O2Y | Uncommon Files |
| .O2Z | Uncommon Files |
| .O3 | Uncommon Files |
| .O30 | Uncommon Files |
| .O31 | Uncommon Files |
| .O32 | Uncommon Files |
| .O33 | Uncommon Files |
| .O34 | Uncommon Files |
| .O35 | Uncommon Files |
| .O36 | Uncommon Files |
| .O37 | Uncommon Files |
| .O38 | Uncommon Files |
| .O39 | Uncommon Files |
| .O3A | Uncommon Files |
| .O3B | Uncommon Files |
| .O3C | Uncommon Files |
| .O3D | Uncommon Files |
| .O3E | Uncommon Files |
| .O3F | Uncommon Files |
| .O3G | Uncommon Files |
| .O3H | Uncommon Files |
| .O3I | Uncommon Files |
| .O3J | Uncommon Files |
| .O3K | Uncommon Files |
| .O3L | Uncommon Files |
| .O3M | Uncommon Files |
| .O3N | Uncommon Files |
| .O3O | Uncommon Files |
| .O3P | Uncommon Files |
| .O3Q | Uncommon Files |
| .O3R | Uncommon Files |
| .O3S | Uncommon Files |
| .O3T | Uncommon Files |
| .O3U | Uncommon Files |
| .O3V | Uncommon Files |
| .O3W | Uncommon Files |
| .O3X | Uncommon Files |
| .O3Y | Uncommon Files |
| .O3Z | Uncommon Files |
| .O40 | Uncommon Files |
| .O41 | Uncommon Files |
