| Acronym | Meaning |
 | DACT | Data Automated Communications Terminal - Dissimilar Air Combat Training |
| TLD | Thermoluminescent Dosimeter - Top-Level Domain |
| ADS | Active Denial System - Astrophysics Data System - Attention Deficit Syndrome |
| CTSS | Compatible Time-Sharing System |
| ABN | Australian Business Number (a Number Issued By The Australian Government As Registration Of A Business And Used For Taxation Purposes) |
| PCZ | Panama Canal Zone (ISO 3166 Trigram; Obsolete 1980) |
| PDD | Past Due Date - Presidential Decision Directive |
| MTF | Medical Treatment Facility - Message Text Format |
| RH | Rhodium |
| LCC | Land Component Commander |
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