NCS is an acronym with more than one meaning:
- NCS Pte Ltd (formerly National Computer Systems and National Computer Board of The Singapore Government) - a leading global eGovernment consultant and solution provider. See http://www.ncs.com.sg for more information.
- The National Compensation Survey of the U.S. Bureau of Labor Statistics. See http://www.bls.gov/ncs for details.
- The National Cartoonists Society
- Naval Control of Shipping
- The Scandinavian Colour Institute's Natural Color System
- The National CAD Standard
- The U.S. National Clandestine Service
- The U.S. National Communications System
- The National Crime Squad, a former British police organisation
- The Newark City Subway in Newark, New Jersey
- The Neighborhood Charter School in Atlanta, Georgia
- The Network-based Call Signaling agent, used with the Voip protocol, MGCP
- Apollo Computer's Network Computing System, an RPC standard that evolved into DCE
- The National Cathedral School in Washington, D.C.
- The Newark Charter School in Newark, DE
- The North Coast Section, an athletic organization in Northern California
- Network Custody and Clearing System (TCS Product for Custody Business)