| Acronym | Meaning |
| UMES | University Of Maryland Eastern Shore |
| SYR | Syria (ISO 3166 Trigram) |
| DIY | Do It Yourself |
| DAFIF | Digital Aeronautical Flight Information File |
| CHE | Switzerland (ISO 3166 Trigram; From Latin Confoederatio Helvetica) |
| CBS | Columbia Broadcasting System - Corps Battle Simulation |
| IY | Iraqi-Saudi Neutral Zone (FIPS 10-4 Territory Code; Obsolete 1993) |
| AT | Astatine |
| GAB | Gabon (ISO 3166 Trigram) |
| RE | Rhenium |