(Microsoft Office Resource Kit) CMYK – (i) Cyan Magenta Yellow Key/blacK (color model) CN CN (i/s) Canadian National (railway; also the AAR reporting mark for said company) (s) China (ISO 3166 digram) Comoros (FIPS 10-4 country code) CNA (i) Center for Naval Analyses Certified Network Administrator Computer Network Attack Continental (Casualty Company), National (Fire Insurance Company), and American (Casualty Company), the three companies that merged to form what is now known as CNA Financial CNBC – (a/i) Consumer News and Business Channel CND (i) Campaign for Nuclear Disarmament Computer Network Defence CNE (i) Canadian National Exhibition Computer Network Exploitation Certified Network Engineer CNES – (i) Centre national d'études spatiales (French, "National Centre for Space Studies") CNF – (p) Cost and Freight CNI – (i) Communications, Navigation and Identification CNI – (a) Clinical Nursing Intern CNN (i) Cable News Network Cellular Nonlinear Network CNO – (i) Computer Network Operations CNR (i) Canadian National Railway Combat Net Radio CNV – (i) Copy-Number Variable (genetics) CNY – (s) Chinese yuan renminbi (ISO 4217 currency code) CO c/o – (i) care of (postal code indicating temporary address change) co – (s) Corsican language (ISO 639-1 code) Co – (s) Cobalt Co. – Company CO – many, including Central Office (phone company); see entry – (s) Colorado (postal symbol) – (i) Commanding Officer (military) COA – (i) Certificate/Concept Of Analysis – Course Of Action (military) COB – (i) Close Of Business [day] COBOL (p) – COmmon Business-Oriented Language COBRA – Consolidated Omnibus Budget Reconciliation Act of 1985 COCOM – (p) Combatant Command (military) COD – (i) Cash On Delivery – (s) Democratic Republic of the Congo (ISO 3166 trigram) CoDA – (i) Co-Dependents Anonymous codec – (p) Coder-Decoder / Compressor-Decompressor / Compression-Decompression algorithm COE – (i) Cab Over Engine (see truck) – Common Operating Environment (military) COEA – (i) Cost Operational Effectiveness Analysis (military) COEIA – (i) Combined Operational Effectiveness and Investment Appraisal (military) C of I – (i) Certificate of Indebtedness (financial) – (i) The College of Idaho COFT – (i) Conduct Of Fire Trainer (military) COG – (i) Centre Of Gravity – Current Operations Group (military) – (s) Republic of the Congo (ISO 3166 trigram) COGENT – (a) Cognitive Objects within a Graphical EnviroNmenT COIL – (a) Chemical Oxygen Iodine Laser COIN – (p) Counter-Insurgency (military) COK – (s) Cook Islands (ISO 3166 trigram) COL – (s) Colombia (ISO 3166 trigram) COLA –