| Acronym | Meaning |
 | ADS | Active Denial System - Astrophysics Data System - Attention Deficit Syndrome |
| APOLLO | Apache Point Observatory Lunar Laser-ranging Operation |
| AM | Amharic Language (ISO 639-1 Code) - Attometre |
| G | Gram |
| HZ | Hertz |
| RATELO | Radiotelephone Operator |
| ESL | English As A Second Language |
| TRAP | Tactical Receive Equipment And Related Applications |
| OMN | Oman (ISO 3166 Trigram) |
| DCE | Data Communication Equipment |
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