| Acronym | Meaning |
| CS | Cable Ship |
| CS | Call Sign (military) |
| CS | Change Status |
| CS | Channel Shuffling (mobile communications) |
| CS | Chaplain Service (Air Force; US DoD) |
| CS | Chief of Staff |
| CS | Chief Secretary (for Administration; Hong Kong) |
| CS | Chief Steward (various organizations) |
| CS | Chondroid Syringoma (tumor) |
| CS | Civil Service |
| CS | Civil Support |
| CS | Classified Sensitive |
| CS | Clogged Stream |
| CS | Close Support |
| CS | Coastal Station (US DoD) |
| CS | Colonne Sèche (French: Dry Column; firefighting device) |
| CS | Colorado Springs |
| CS | Combat Sent |
| CS | Combat Support |
| CS | Combat Surveillance |
| CS | Combat System |
| CS | Commercial Service (US Department of Commerce) |
| CS | Commissaryman (USN Rating) |
| CS | Communication Scheduler |
| CS | Communications Security |
| CS | Communications Segment |
| CS | Communications Squadron |
| CS | Community Service |
| CS | Competition Sensitive |
| CS | Competitive Sourcing |
| CS | Compliance Subcommittee |
| CS | Component Supplier |
| CS | Computer Services |
| CS | Computing Services |
| CS | Conducted Susceptibility |
| CS | Conseiller a la Sécurité (French: Security Advisor) |
| CS | Construction Specialist |
| CS | Contamination Survivability |
| CS | Content Staging |
| CS | Contract Services |
| CS | Contract Specialist |
| CS | Contracting Specialist (USACE) |
| CS | Contractor Support |
| CS | Contractual Specification |
| CS | Contributory Support |
| CS | Control Section |
| CS | Control Segment |
| CS | Control Set |
| CS | Control Station (US Army) |
| CS | Control Store |
| CS | Controlled Space (US DoD) |
| CS | Controlled Substance |
| CS | Core Stage (space flight) |
| CS | Counter Strike |
| CS | Countersabotage |
| CS | Creeping Line Single-Unit (US DoD) |
| CS | Crew Simulator |
| CS | Crew Station |
| CS | Crew Systems |
| CS | Critical Source (US DoD) |
| CS | Criticality Safety (nuclear) |
| CS | Critically Sensitive |
| CS | Cruiser Squadron (US Navy) |
| CS | Crystal Square (Crystal City, Arlington, VA) |
| CS | Culinary Specialist (navy rating) |
| CS | Orthochlorobenzalmalononitrile (tear gas) |