| Acronym | Definition |
|---|
| JCS | Joint Chiefs of Staff (US DoD) |
| JCS | Journal of Cell Science |
| JCS | Journal of Computer Security |
| JCS | Jefferson County Schools |
| JCS | Jesus Christ Superstar (rock opera) |
| JCS | John C. Stennis (US Navy strike group) |
| JCS | Journal of Cereal Science |
| JCS | Journal of Classical Sociology |
| JCS | Journal of Cuneiform Studies |
| JCS | Journal of Consciousness Studies (UK) |
| JCS | USS John C. Stennis (CVN-74) |
| JCS | Johnston County Schools |
| JCS | Jarden Consumer Solutions (Boca Raton, Florida) |
| JCS | Johnson Controls-Saft (Johnson Controls, Inc. and Saft SA) |
| JCS | Joint Stock Company |
| JCS | Jackson Christian School (Jackson, Tennessee) |
| JCS | JCS Computing Solutions (UK) |
| JCS | Japan Coma Scale |
| JCS | Java Caching System |
| JCS | Jewish Community Services of South Florida |
| JCS | Journal of Canadian Studies |
| JCS | Japanese Cultural Society |
| JCS | Journal of Chromatographic Science |
| JCS | JCS Conflation Suite |
| JCS | Jimmie's Chicken Shack (band) |
| JCS | Journal of Church and State |
| JCS | Journal of Curriculum Studies (Canada) |
| JCS | Jordan Computer Society |
| JCS | JANET Customer Service |
| JCS | Justice and Community Safety (Australia) |
| JCS | Journal of Conflict Studies |
| JCS | Jazz Creation Station (game level editor) |
| JCS | Jerusalem Capital Studios |
| JCS | Juvenile Court Services |
| JCS | Journal of Cardiac Surgery |
| JCS | Jay Computer Services |
| JCS | Job Control System |
| JCS | Journal of Cultural Studies |
| JCS | Jewish Chautauqua Society |
| JCS | Japanese Classification Society |
| JCS | Jasper City Schools (Alabama) |
| JCS | Jewish Cultural Society |
| JCS | Job Control Statement |
| JCS | Jenison Christian School (Jenison, MI, USA) |
| JCS | James Cameron School |
| JCS | Job Control Service |
| JCS | Japan Computing Systems |
| JCS | Jewelry Computer Systems |
| JCS | Jay Chou Studio |
| JCS | Joint Collaboration Services |
| JCS | Jerome Communications Software |
| JCS | Jersey Careers Service (Jersey, UK) |
| JCS | Jewish Campus Services |
| JCS | Jonesboro Computer Services |
| JCS | Joint Command System |
| JCS | Judaic Cultural Society (Bronx High School of Science; Bronx, NY) |
| JCS | Jon Sims Center for the Arts |
| JCS | Josephine County Community Services (Oregon) |
| JCS | John Carroll Society |
| JCS | Journal of Communications and Networks (Korean Institute of Communication Sciences) |
| JCS | Joint Command Ship |
| JCS | James Connolly Society of Canada and the United States (Austin, TX) |
| JCS | Julian Charter School (California) |
| JCS | Julian Cho Society (Belize) |
| JCS | Journal of Curriculum and Supervision |
| JCS | Journal of Computer Science (various organizations) |
| JCS | Johan Cruijff Schaal (Dutch: Johan Cruijff Shield; soccer competition) |