| MOO | MacIntosh OS (Operating System) Optimizer 
| Others |
| MOO | MaDCoWS Overdense Object
| Others |
| MOO | Management Of Objectives
| Others |
| MOO | Marine Our Oasis
| Others |
| MOO | Massive Overdense Object
| Others |
| MOO | Master Of Orion
| Others |
| MOO | Matter of Opinion
| Others |
| MOO | Measure Of Outcome
| Others |
| MOO | Memorandum Of Objection
| Others |
| MOO | Met Office Online
| Others |
| MOO | Microsoft Oem Online
| Others |
| MOO | Microsoft Office Outlook
| Others |
| MOO | Mijn Omgeving Online
| Others |
| MOO | Minis Of Orlando
| Others |
| MOO | Mobile Online and Offline
| Others |
| MOO | Moomba, South Australia, Australia
| Others |
| MOO | MoonRock language source code file
| Others |
| MOO | Mostly Organic Origin
| Others |
| MOO | Mostly Organic Origins
| Others |
| MOO | Mothers Of Ompalaceles
| Others |
| MOO | Mothers Opposed to the Occult
| Others |
| MOO | Mud Object Oriented
| Others |
| MOO | Mud Object Orientedmoo
| Others |
| MOO | Mud Oriented Objects
| Others |
| MOO | MUD, Object Oriented
| Others |
| MOO | Multi Objective Optimizer
| Others |
| MOO | Multi-Object Oriented
| Others |
| MOO | Multi-player Online Object
| Others |
| MOO | Multi-user Object Oriented
| Others |
| MOO | Multiuser Object Oregonstate
| Others |
| MOO | Multiuser Object Orientated
| Others |
| MOO | Multiuser Object Oriented
| Others |
| MOO | Museums Outreach Online
| Others |
| MOO | Mutual of Omaha
| Others |
| MOO | Mutuality of Obligation In order
| Others |