| Acronym | Meaning |
 | CCH | Computer-Controlled Hostile |
 | DOS | Denial Of Service (DoS |
 | BQ | British Antarctic Territory (ISO 3166 Digram; Merged With AQ In 1979) - Navassa Island (FIPS 10-4 Territory Code) |
 | CSK | Czechoslovakia (ISO 3166 Trigram; Obsolete Since 1993) |
 | ROK | Republic Of Korea |
 | QCA | Qualifications And Curriculum Authority - Quality Council Of Alberta |
 | BDNF | Brain-Derived Neurotrophic Factor |
 | SSV | Soft-Skinned Vehicle (i.e |
 | C2IEDM OR C?IEDM | Command And Control Information Exchange Data Model |
 | CO | Cobalt |