| Acronym | Definition |
|---|
| MNO | Mobile Network Operator (wireless telecommunications) |
| MNO | Magnetic North Orchestra (est. 1992) |
| MNO | Manganese Oxide |
| MNO | Mcafee Network Optimization |
| MNO | Mobile Network Operator |
| MNO | Macromedia Design Notes |
| MNO | MusicaNova Orchestra (est. 2003) |
| MNO | Mom's Night Out |
| MNO | Multinational Organization |
| MNO | Macromedia Design Notes (file extension) |
| MNO | Merlin Network One |
| MNO | Money No Object |
| MNO | Muslimanska Narodna Organizacija (Croatian: Muslim National Organization; political party) |
| MNO | Muonio (Finland) |
| MNO | Midnight Order (gaming clan) |
| MNO | Master of Non-profit Organizations |
| MNO | Multimedia Network Operator |
| MNO | Managed Network Operations |