| Acronym | Definition |
|---|
| OOo➣Openoffice.org (Sun Microsystems) |
| OOo➣One on One |
| OOo➣Out Of Order (execution) |
| OOo➣Odd One Out |
| OOo➣Oscuro's Oblivion Overhaul (gaming, The Elder Scrolls: Oblivion IV mod) |
| OOo➣Oil of Olay (cosmetic) |
| OOo➣Open Office Org |
| OOo➣Out of Order |
| OOo➣On Our Own |
| OOo➣Out Of Office |
| OOo➣Out of the Ordinary |
| OOo➣Optical Optical Optical (telecommunications switching) |
| OOo➣Of Obscure Origin |
| OOo➣Outwit Outplay Outlast (Survivor TV Show) |
| OOo➣Out Of Option |
| OOo➣Obschestvo S Ogranichennoi Otvetstvennost'yu (Russian: Limited Liability Company, Llc) |
| OOo➣Object-Oriented Organization |
| OOo➣Object Oriented Operation (TMN) |
| OOo➣Overly Officious Official (sports officiating) |