- CO
- com. abbr.Crystal Oscillatorengin. abbr.Crystal Oscillatorabbr.Check Out (RCS)abbr.Connection Oriented (CL)comp. abbr.Central Officecomp. abbr.Command Outputcomp. abbr.Convert OutacronymCash OrderacronymCentral Office (Telephony)acronymColoradoacronymCommanding OfficeracronymConscientious Objector
United dictionary of abbreviations and acronyms. 2015.