C - Charlie 
C - Charlie Time Zone 
C - Coastal 
C - Confidential 
C - Coniferous 
C - Crisis 
C&A - Certification and Accreditation 
C&D - Cover and Deception 
C&E - collection and exploitation 
C&E - Communication and Electronic 
C&GS - Command and General Staff 
C&J - Collection and Jamming 
C&LB - Coasts and Landing Beaches 
C&M - Care and Maintenance 
C&P - Characteristics and Performance 
C-BITE - Continuous Built in Test Equi… 
C-C3 - Counter Command, Control and Co… 
C-E - Communications Electronics 
C-E - Communications-Electronics 
C-HUMINT - Counter Human Resources Int… 
C-IED - Counter-Improvised Explosive D… 
C-IMINT - Counter Imagery Intelligence 
C-in-C - Commander-in-Chief 
C-LAMP - Community Laser Measurement P… 
C-MASINT - Counter-Measures and Signat… 
C-NAF - component-Numbered Air Force 
C-P - Counterproliferation 
C-QUIP - Combined Quarterly Intelligen… 
C-RISTA - Counter-Reconnaissance, Inte… 
C-SIGINT - Counter Signals Intelligenc…