Telecom Abbreviations and Acronyms

1. CIS
   Computer and Information Science
2. CIS
   Commonwealth of Independent States
3. CIS
   CompuServe Information Service
4. CIS
   Communications and Information Systems
5. CIS
   Center for Integrated Systems
6. COO
   Cost of Ownership
7. COO
   Chief Operation Officer
8. COO
   Cell of Origin
9. COP
   Character Oriented Protocol
10. COPS
    Common Open Policy Service
11. COPS
    Caring Operators Personal Service
12. CoR
    Carrier Operated Relay
13. COT
    Central Office Terminal
14. CRS
    Cell Relay Service
15. CSR
    Customer Service Representative
16. CSR
    Customer Service Report
17. CSR
    Customer Service Request
18. D
    Diagonal
19. D
    Drop
20. E
    Exchange

Last updated: October 28, 2020 — Total entries: 29,496