| Acronym | Sense | Language | Topics |
|---|---|---|---|
| MMO | Monda Meteologia Organizo (www.wmo.int) = WMO | World Meteorological Organization | In English = OMM | Organisation Météorologique Mondiale | In French |
In Esperanto | → Organizations and associations → Meteorology, climatology → United Nations |
| MMO | Massively Multiplayer Online | In English | → Software → Networks, communication |
| MMO | Met Moeite Opgericht | In Dutch | → Organizations and associations → Sport, physical exercises |