| ID | Name | Type |
|---|---|---|
| #10480 | O&F | ? |
| #10481 | O-Set | ? |
| #10482 | O. Garcia | + |
| #10483 | O. Hohlov | + |
| #18591 | O. Nechvátal | + |
| #10485 | O. Przesmycki | + |
| #20930 | O. R. Luís | + |
| #22650 | O. Schmidt | + |
| #10486 | O. Seaman | + |
| #10487 | O. Steen Hansen | + |
| #22694 | O. Turpin | + |
| #10488 | O.E. Ltd | Z |
| #10489 | O.I.C. Ltd | Z |
| #10490 | O.Sheen Software | Z |
| #10491 | OAM | ? |
| #10492 | OCTA Soft | Z |
| #10493 | OCTOCOM | ? |
| #16025 | OEL | P |
| #20719 | OI3 | P |
| #17580 | OJ Software | S |