Cascading Style Sheets 
Combat Service Support 
Communication Support System 
Cascading Style Sheet 
Central Security Service 
Content Scrambling System 
can't stop smiling 
Communications Support System 
Content Scramble System 
Controlled Slip Seconds 
Coastal Systems Station 
Customer Switching System 
Community Support Services 
Coordinator Surface Search 
Customer Support System 
Center for Security Studies 
Coarse Sun Sensors 
College Scholarship Service 
Combat Services Support 
communications support segment 
Communications System Segment 
Constant Surveillance Service 
Contact Start-Stop 
control stick steering 
CREYSSENSAC 
Cross-Site Scripting 
Customer Satisfaction Survey 
Cassini Stratospheric Sounder 
Catalina Sky Survey 
Cellular Subscriber Station