Army Abbreviations and Acronyms

1. CAS
   Calibrated Air Speed
2. CAT
   Category (e.g. CAT-5 cable)
3. CCS
   Command and Control Systems
4. CEO
   Chief Executive Officer
5. CIO
   Chief Information Officer
6. CIO
   Central Imagery Office
7. CIS
   Commonwealth of Independent States
8. CIS
   Combat Intelligence System
9. CoR
   contracting officer representative
10. CRS
    Congressional Research Service
11. CRS
    Community Relations Service
12. CSR
    Current Situation Room
13. D
    Delta
14. D
    Department
15. D
    Director
16. D
    Directive
17. D
    Drummer
18. R
    Radiation
19. R
    Receive
20. R
    Referee

Last updated: December 19, 2021 — Total entries: 29,691