| Acronym | Meaning |
 | QT | Quentin Tarantino - QuickTime - QuikTrip |
| BFSA | Blue Force Situation Awareness |
| XCBL | XML Common Business Library |
| AGU | American Geophysical Union |
| ZT | Zeptotesla |
| OO | Object Oriented - Over & Out |
| O | Oberst - Observer - Obstacle - Octal - Officer - Official - Oh - Operational - Operator - Oprah (magazine) - Outstanding -Oxygen |
| AIRFA | American Indian Religious Freedom Act |
| POD | Plain Old Documentation |
| OC | Occitan Language (ISO 639-1 Code) |
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