| Acronym | Meaning |
 | ABB | ASEA Brown Boveri (Swiss-Swedish Multinational Company) |
| PTUI | Plain-Text User Interface (pa-too-ey) (cf CLI) |
| COIN | Counter-Insurgency (military) |
| CSS | Cascading Style Sheets - Catalina Sky Survey - Central Security Service - Combat Service Support - Confederate States Ship - Content-scrambling System - Cross-site Scripting |
| LAT | Latin Language (ISO 639-2 Code) |
| CA | California (postal Symbol) - Canada (FIPS 10-4 Country Code; ISO 3166 Digram) - Catalonia -Civil Affairs - Close Armour - Computer Associates - Counter-Air |
| AAFES | Army And Air Force Exchange Service |
| USGS | United States Geological Survey |
| YJ | Yoctojoule |
| SIMM | Single In-line Memory Module |
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