| Acronym | Meaning |
 | O | Oberst - Observer - Obstacle - Octal - Officer - Official - Oh - Operational - Operator - Oprah (magazine) - Outstanding -Oxygen |
 | CG | Client Group - Computer Graphics -Democratic Republic Of The Congo (FIPS 10-4 Country Code) - Republic Of The Congo (ISO 3166 Digram) |
 | GNP | Gross National Product |
 | HTI | Haiti (ISO 3166 Trigram) |
 | NTV | Non-Tactical Vehicle |
 | HIN | Hindi Language (ISO 639-2 Code) |
 | GLAC | General Ledger Accounting Code |
 | OP | Observation Point/Post |
 | DSCS | U.S. Defense Satellite Communications System |
 | TOS | Tape Operating System - Terms Of Service - Tramiel Operating System |