| Odicin ("Member of BOINC Confederation") |  | Olivier ("I have been crunching since 1999 and it's just plain fun. Besides user and team...") | |
 | olivier |  | Opolis ("Mechanical Engineer from California, USA. I love computers, cars, music, sports, and...") |
 | oldjerry ("Důlchodce, 1937, Lovosice,") |  | Ousermaatre ("In French: Salut à toute la communauté francophone du calcul partagé. Membre depuis...") |
| olsen_gg ("Hallo, ich komme aus Stralsund (Deutschland) und habe mit Computern eigentlich nur...") |  | OE1TKS (" ") | |
| oxygen64 |  | Overtonesinger ("Born in 1979, I am a computer programmer, father of twins-girls and a well known overtone...") |