The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Omicron Iota (2 members)
- Omicron Kappa (5 members)
- Omicron Mu (6 members)
- Omicron Pi (1 member)
- Omicron Psi (1 member)
- Omicron Theta (3 members)
- Omicron Zeta (4 members)
- Ontario (6 members)
- Orbital Spa & Cruise (5 members)
- Orkney (3 members)
- Orleanais (8 members)
- Outcast Capitals (4 members)
- Outcasts (16 members)
- Outcasts Ships (6 members)
- Pages with broken file links (536 members)
- Pennsylvania (9 members)
- Picardy (8 members)
- Planetform, Inc. (7 members)
- Provence (4 members)
- Red Hessians (7 members)
- Red Hessians Capitals (2 members)
- Red Hessians Ships (4 members)
- Renzu Shipline (3 members)
- Repair Ship (2 members)
- Rheinland (59 members)
- Rheinland Black Market Ships (6 members)
- Rheinland Civilian (7 members)
- Rheinland Federal Police (10 members)
- Rheinland Lawful Capitals (4 members)
- Rheinland Lawful Ships (7 members)
- Rheinland Military (6 members)
- Rheinland Outer Region (4 members)
- Rheinland Unlawful Ships (1 member)
- Roussillon (6 members)
- Royal Liner (1 member)
- S graviton01 (34 members)
- S molecular01 (17 members)
- S nomad01 (4 members)
- S positron01 (26 members)
- Samura Industries (8 members)
- Samura Ships (Heavy) (2 members)
- Shields (96 members)
- Shikoku (10 members)
- Ships (366 members)
- Sigma-13 (4 members)
- Sigma-15 (6 members)
- Sigma-17 (2 members)
- Sigma-19 (3 members)
- Sigma-59 (10 members)
- Sigma Border Worlds (37 members)