| CISC | Caltech International Spouses Club 
| Others |
| CISC | Campus Information Security Committee
| Others |
| CISC | Canadian Indonesian Social Club
| Others |
| CISC | Canadian Institute of Steel Construction
| Others |
| CISC | Career and Internship Services Center
| Others |
| CISC | Career Internship Services Center
| Others |
| CISC | Caribbean Island Swimming Championships
| Others |
| CISC | Catholic Independent Schools Conference
| Others |
| CISC | Centre for Innovation and Structural Change
| Others |
| CISC | Chicago Interactive Social Club
| Others |
| CISC | Chinese Information and Service Center
| Others |
| CISC | Chongqing Iron and Steel Company
| Others |
| CISC | Circuit Switch
| Others |
| CISC | Cisco Certification
| Others |
| CISC | Clean Intermittent Self Catheterization
| Others |
| CISC | Clean intermittent self-catheterization
| Others |
| CISC | Clemson Institute for the Study of Capitalism
| Others |
| CISC | COAG Industry and Skills Council
| Others |
| CISC | Colorado Information Sharing Consortium
| Others |
| CISC | Colorado Investment Services Coalition
| Others |
| CISC | Combat Identification Systems Conference
| Others |
| CISC | Complete Instruction Set Computer
| Others |
| CISC | Complex Insruction Set Computers
| Others |
| CISC | Complex Instruction Set Computer
| Others |
| CISC | Complex Instruction Set Computers
| Others |
| CISC | Complex Instruction Set Computing
| Others |
| CISC | Complex Instructions Standard Computing
| Others |
| CISC | Computer and Information SCiences
| Others |
| CISC | Computer Information Storage Center
| Others |
| CISC | Computer Instruction Set Compliment
| Others |
| CISC | Connecticut Industrial Ski Council
| Others |
| CISC | Construction Industry Safety Coalition
| Others |
| CISC | Continuous Inventory of Stand Conditions
| Others |
| CISC | Cook Inlet Soccer Club
| Others |
| CISC | Creative Industry Skills Council
| Others |
| CISC | Creative Internet Solutions Consortium
| Others |
| CISC | Criminal Intelligence Service Canada
| Others |
| CISC | Criminal Intelligence Service of Canada
| Others |
| CISC | CRTC Interconnection Steering Committee
| Others |
| CISC | CUNY Institute
| Others |
| CISC | CUNY Institute for Sustainable Cities
| Others |
| CISC | Curriculum and Instruction Steering Committee
| Others |
| CISC | Cyber and Information Security Consortium
| Others |
| CISC | Cyber Incident Sharing Center
| Others |