[1] Computer Mediated Communication, s. Email, News

[2] Communication Machinery Corp.

[3] Call Modification Completed (SS7: in ISUP)

[4] Coherent Multi-Channel systems

[5] Central Maintenance Centre

[6] Communications Mode Control (->"IEEE Standard Dictionary")

[7] Code for Magnetic Characters (->"IEEE Standard Dictionary")

[8] Canadian Marconi Company (->"Lexikon der Text- und Datenkommunikation")

[9] Common Mail/Messaging Call

[10] Construction Maintenance Center

[11] Crew Module Computer (->"NASA Acronym List").