| Acronym | Definition |
|---|
| CIS➣Commonwealth of Independent States (formerly the USSR) |
| CIS➣CompuServe Information Service |
| CIS➣Computer Information Systems |
| CIS➣Customer Information System |
| CIS➣Center for Imaging Science (Johns Hopkins University) |
| CIS➣Center for Immigration Studies |
| CIS➣Computer and Information Science (University of Pennsylvania) |
| CIS➣Computer Information Science |
| CIS➣Cancer Information Service (National Cancer Institute) |
| CIS➣Construction Industry Scheme (UK) |
| CIS➣Career Information System |
| CIS➣Citizenship and Immigration Services (US Department of Homeland Security) |
| CIS➣Council of International Schools |
| CIS➣Continuous Ink System |
| CIS➣Crime in Sports (podcast) |
| CIS➣Contact Image Sensor |
| CIS➣Congressional Information Service |
| CIS➣Center for International Studies (Massachusetts Institute of Technology) |
| CIS➣Center for Internet Security |
| CIS➣Chief of Service (various organizations) |
| CIS➣Canadian Ice Service (government agency) |
| CIS➣Centre International de Séjour (French: International Center for Living; est. 1979) |
| CIS➣Center for Industrial Services |
| CIS➣Canadian Interuniversity Sport |
| CIS➣Centre for Independent Studies (Australia) |
| CIS➣Card Information Structure |
| CIS➣Center for Internet and Society (Stanford Law School) |
| CIS➣Centre d'Incendie et de Secours (French: Fire and Rescue Center; various locations) |
| CIS➣Carcinoma in Situ |
| CIS➣Cluster Ion Spectrometry experiment (Cluster spacecraft) |
| CIS➣Canadian Industry Statistics |
| CIS➣Complete Internet Services |
| CIS➣Canadian International School |
| CIS➣CMOS Image Sensor |
| CIS➣Computational Intelligence Society (IEEE) |
| CIS➣Clinical Information System |
| CIS➣Computational Intelligence and Security (IEEE conference) |
| CIS➣Change in Status |
| CIS➣Centre for International Studies |
| CIS➣Comodo Internet Security (software) |
| CIS➣Chiba Institute of Science (Japan) |
| CIS➣Cable Inlay System (various companies) |
| CIS➣Comparative and International Studies (Switzerland) |
| CIS➣Continuous Interleaved Sampling (cochlear implants) |
| CIS➣Client Information Sheet |
| CIS➣Christians in Sport (UK) |
| CIS➣Cloud Infrastructure and Services (course) |
| CIS➣Communications Infrastructure and Services (industry sector) |
| CIS➣Current Index to Statistics |
| CIS➣Confederacy of Independent Systems (Star Wars) |
| CIS➣Childcare Information Service (UK) |
| CIS➣Composite Information Server (Composite Software Inc.) |
| CIS➣Capita Insurance Services (UK) |
| CIS➣Catholic Institute of Sydney (Sydney, Australia) |
| CIS➣Chartered Institute of Stockbrokers (Nigeria) |
| CIS➣Citizen Information Service |
| CIS➣Collaborations in Internet Security |
| CIS➣Content Identification System |
| CIS➣Commercial Internet System |
| CIS➣Customer Intercept Service |
| CIS➣Cooperative Information Systems |
| CIS➣Computer Information System |
| CIS➣Center for Internet and Society |
| CIS➣Context Information Store |
| CIS➣Computer Interface Station |
| CIS➣Commercial Internet Service |
| CIS➣Content Immutable Storage |
| CIS➣Common Internet Services |
| CIS➣Collective Investment Scheme (Citibank) |
| CIS➣Corporate Identity System |
| CIS➣Clinically Isolated Syndrome |
| CIS➣Copper-Indium-Diselenide |
| CIS➣Combined Independent Schools (Australia) |
| CIS➣Consular Information Sheets |
| CIS➣Childhood Immunization Status (various locations) |
| CIS➣Critical Incident Stress |
| CIS➣Bureau of Citizenship and Immigration Services (US Department of Homeland Security) |
| CIS➣Concordian International School (Thailand) |
| CIS➣Communication and Interpersonal Skills |
| CIS➣Consider It Sold (Colorado) |
| CIS➣Cardiovascular Institute of the South |
| CIS➣Community Innovation Survey |
| CIS➣Catholic Information Service (Knights of Columbus) |
| CIS➣Center for Integrated Systems (Washington Community and Technical Colleges) |
| CIS➣Corporate Information Services |
| CIS➣Confederation of Independent States (former Soviet Union) |
| CIS➣Christians in Science (UK) |
| CIS➣Corporación Interuniversitaria de Servicios (Spanish: Interuniversity Services Corporation; Colombia) |
| CIS➣Cape Instrument Services (South Africa) |
| CIS➣Consumer and Industry Services |
| CIS➣Component Integration Services |
| CIS➣Centre d'Information sur la Surdité (French: Information Center on Deafness) |
| CIS➣Construction Industry Software |
| CIS➣Community Integrated Services (various locations) |
| CIS➣Copper Indium Selenide (compound semiconductor) |
| CIS➣Copenhagen International School |
| CIS➣Chemical Inventory System |
| CIS➣Cancer Information Specialist |
| CIS➣Corporate Information Security |
| CIS➣Civil Infrastructure Security |
| CIS➣Customs Information System (US Customs) |
| CIS➣Consumer Information Source (National Association of Insurance Commissioners) |
| CIS➣Comite Internacional de Seguimiento (Spanish: International Monitoring Committee) |
| CIS➣Central Information System |
| CIS➣Community Information System |
| CIS➣Customer Interaction Software |
| CIS➣Central Intermediate School (various locations) |
| CIS➣Clinical Immunology Society |
| CIS➣Certificate of Indian Status (Canada) |
| CIS➣Corporate Information System |
| CIS➣Computational and Information Sciences |
| CIS➣Chemical Information System |
| CIS➣Component Information System |
| CIS➣Criminal Intelligence Section (police incident code; New Zealand) |
| CIS➣Center for Information Services (Washington Community and Technical Colleges) |
| CIS➣Command Information System |
| CIS➣Communication Information Systems (SHAPE) |
| CIS➣Course Instructor Survey |
| CIS➣Canada Investment and Savings (government) |
| CIS➣Completely Integrated Solution |
| CIS➣Community Information Service |
| CIS➣Combat Intelligence System |
| CIS➣Close Interval Survey (oil and gas industry) |
| CIS➣Competitive Intelligence Solution (aka Competitive Response Solution) |
| CIS➣Chinese International School |
| CIS➣Chongqing Iron & Steel (China) |
| CIS➣Civil Infrastructure System (various organizations) |
| CIS➣Cerberus' Internet Scanner |
| CIS➣Communications & Information Systems |
| CIS➣Candidate Information Sheet |
| CIS➣Centro de Intercambio y Solidaridad (Center for Exchange and Solidarity) |
| CIS➣Catastrophic Incident Supplement (National Response Plan) |
| CIS➣Communications Interface Shelter (US DoD) |
| CIS➣Centralized Interim Storage (nuclear energy) |
| CIS➣Continuous Injection System |
| CIS➣Central Index System |
| CIS➣Co-operative Insurance Society, Ltd. (UK) |
| CIS➣Communauté Israélite de Strasbourg (French: Jewish Community of Strasbourg; Strasbourg, France) |
| CIS➣Customer Interactive Solutions (various locations) |
| CIS➣Corporate Identity Solutions (various locations) |
| CIS➣Center for Instructional Support |
| CIS➣Centre International d'Informations de Sécurité et de Santé au Travail (French: International Occupational Safety and Health Information Centre; Switzerland) |
| CIS➣Countryside Information System |
| CIS➣City Information Systems |
| CIS➣Comunita degli Stati Indipendenti (Italian: Commonwealth of Independent States) |
| CIS➣Chartered Institute of Secretaries |
| CIS➣Cops in Schools |
| CIS➣Central Indiana Section (IEEE) |
| CIS➣Competitive Impact Statement |
| CIS➣Contrarian Investment Strategy |
| CIS➣Centre for Intercultural Studies |
| CIS➣Center for Islam and Science |
| CIS➣Cargill Investor Services |
| CIS➣Center for Insect Science (University of Arizona) |
| CIS➣Crime Information System |
| CIS➣Citicorp Investment Services |
| CIS➣Central Intelligence Service (Privateer 2 PC game) |
| CIS➣CASE Integration Services |
| CIS➣Colombo International School (Sri Lanka) |
| CIS➣Cancer Information System |
| CIS➣Critical Issues Symposium (various organizations) |
| CIS➣Company Information System |
| CIS➣Content Intelligence Services (Documentum product) |
| CIS➣Civil Society Initiative (WHO) |
| CIS➣Center for Injury Sciences (University of Alabama at Birmingham) |
| CIS➣Center for Ignatian Spirituality (Los Angeles, CA) |
| CIS➣Construction Information Sources |
| CIS➣Carlisle Indian School (Pennsylvania) |
| CIS➣Chemical Injection System |
| CIS➣Combat Identification System |
| CIS➣Conference of Independent Schools of Ontario |
| CIS➣Centre Ingénierie et Santé (French: Engineering and Health Center) |
| CIS➣Continuous Improvement System (total quality management system) |
| CIS➣Cluster Ion Spectrometer |
| CIS➣Composite Image Systems |
| CIS➣Customer Inquiry System (various businesses) |
| CIS➣Curriculum and Instructional Services |
| CIS➣Criminal Information System |
| CIS➣Component Interface Specification |
| CIS➣Combat Information System |
| CIS➣Computer Information Service |
| CIS➣Commercial Industrial Services |
| CIS➣Corrections Information System |
| CIS➣Comunidad Israelita de Santiago |
| CIS➣Content Integration Server |
| CIS➣Communication Interface System |
| CIS➣Collection Information System |
| CIS➣Center for Ideas and Society |
| CIS➣Card Information System |
| CIS➣Catering International and Services |
| CIS➣Conventional Inertial System |
| CIS➣China Inspection Services (Beijing, China) |
| CIS➣Communites in Schools |
| CIS➣Certification Information Service |
| CIS➣Corinthian Internet Services (AU) |
| CIS➣Contracts Information System |
| CIS➣Californians for Inclusive Schools |
| CIS➣Comptroller Information System |
| CIS➣Core Integration System |
| CIS➣Cabinet d'Investigations de Strasbourg (French: Office of Investigations in Strasbourg; private investigation agency; Strasbourg, France) |
| CIS➣Certified Investment Specialist |
| CIS➣Cryptology Information Security (publication) |
| CIS➣Pegasus Construction Industry Solutions (UK) |
| CIS➣College Independent Study |
| CIS➣Correspondence Imaging System |
| CIS➣Commemorative Integrity Statement (Canada) |
| CIS➣Catalogue Item Subscription |
| CIS➣Chinese Ichthyological Society (fish) |
| CIS➣Combined Influence Sweep |
| CIS➣Communities in Schools Academy (Durham, NC) |
| CIS➣Class Interface Size |
| CIS➣Carnet Indemnity Scheme (UK) |
| CIS➣Containment Isolation System |
| CIS➣Conductor Insulator Semiconductor |
| CIS➣Castelli International School |
| CIS➣Continuous and Intermittent Simulation (auditing) |
| CIS➣Cast Iron Sleeve (engine part) |
| CIS➣Card Information Services |
| CIS➣Contact Image Sensing (scanner technology) |
| CIS➣Common Item Support |
| CIS➣Customer Interface System |
| CIS➣Combat Instruction Set |
| CIS➣Complex Interactive System |
| CIS➣Certified Investment Strategist |
| CIS➣Career Information Specialist |
| CIS➣Central Iowa Symphony (Ames, IA) |
| CIS➣Calcul Intensif et Simulation (French: Intensive Computing and Simulation) |
| CIS➣Contractor's Information Submittal |
| CIS➣Contract Instruction Services |
| CIS➣Centre for Intergroup Studies (University of Cape Town, South Africa) |
| CIS➣Central IFF System |
| CIS➣Codefusion Internet Services |
| CIS➣Central Integration Site (NASA) |
| CIS➣Command Instrument System (aviation) |
| CIS➣Chemical Imaging System |
| CIS➣Central Integration Site |
| CIS➣Consolidated Investment Services Inc. |
| CIS➣Change Impact Summary |
| CIS➣Chair Indicate Stopped |
| CIS➣Clinical Information Study |
| CIS➣Center for Imaging and Sensing (WPI Metal Processing Institute; Worcester, MA) |
| CIS➣Contractor Information Service |
| CIS➣Component Identification Sheet |
| CIS➣Canadian Inspection Service |
| CIS➣Community and Industry Services |
| CIS➣Career Information Services, Inc (Atlanta, GA) |
| CIS➣Catalogue Interoperability Subsystem |
| CIS➣Customized Information System |
| CIS➣Commercial Imagery Strategy |
| CIS➣Cosine plus i (imaginary number) sine |
| CIS➣Core Instrumentation Subsystem |
| CIS➣Contel Information Systems Incorporated |
| CIS➣Cochannel Interference Suppression |
| CIS➣Colliery Information System (UK) |
| CIS➣Contractor Information Systems |
| CIS➣Convergent Internet Solutions LLC |
| CIS➣Characteristic Isochromat Spectroscopy |
| CIS➣CASE Information Services |
| CIS➣Corrosion Inhibiting Substance |
| CIS➣Communication Informatique Service (French: Computer Communication Service) |
| CIS➣Catalytic Investment Strategy |
| CIS➣Communications Interface Specification |
| CIS➣Computer Intrusion Section (FBI) |
| CIS➣Construction Imaging System (software) |
| CIS➣Cryptographic Interoperability Strategy (US NSA) |
| CIS➣Container Identification System |
| CIS➣Computer Intelligence System |
| CIS➣Control Indicator Set |
| CIS➣Custom Internet Solutions, Inc. |
| CIS➣Council on Invasive Species |
| CIS➣Certificate Issuance Software |
| CIS➣Critical Information Shortfall |
| CIS➣Communications Information Software, Inc. |
| CIS➣Cell Input Switch |
| CIS➣Combat Intelligence Squadron |
| CIS➣Combat Integration/Identification System |
| CIS➣Cryptologic Interface Station |
| CIS➣Creative Intelligent Systems (Workshop) |
| CIS➣Corriente de Integración Sindical (Spanish: Current Integration Association; trade union; Colombia) |
| CIS➣Corporate Implementation System |
| CIS➣Centre d'Informations Scientifiques (French: Center for Scientific Information) |