| Acronym | Meaning |
 | DS | Dear Son (increasingly Prevalent On Social Mailing Lists |
| GIGO | Garbage In Garbage Out (computing) |
| CERT | Computer Emergency Response Team |
| ARDA | Advanced Research And Development Activity (became DTO 2006) |
| AR | Argentina (FIPS 10-4 Country Code; ISO 3166 Digram) - Arkansas (postal Symbol) - Armour |
| IP | Clipperton Island (FIPS 10-4 Territory Code) -Initial Point - Intellectual Property - Internet Protocol |
| AADAC | Alberta Alcohol And Drug Abuse Commission |
| DWIM | Do What I Mean |
| LINEAR | Lincoln Near-Earth Asteroid Research |
| MILSTRIP | Military Standard Requisitioning And Issue Procedure |
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