| Acronym | Meaning |
| MAO | Mol?t? Astronomijos Observatorija (Moletai Astronomical Observatory) - MonoAmine Oxidase |
| DIMM | Dual In-line Memory Module (computing) |
| SNM | Special Nuclear Material |
| SOS | Somali Shilling (ISO 4217 Currency Code) |
| IML | International Mister Leather |
| MX | Mail Exchange -Mexico (FIPS 10-4 Country Code; ISO 3166 Digram) -Missile EXperimental |
| CARP | Computed Air Release Point |
| OGD | Other Government Department |
| LPG | Liquefied Petroleum Gas (cf. LNG) |
| VV&A | Verification, Validation, And Accreditation |