| Rank | Abbreviation | Meaning |
|---|
| ***** | CLIS | Certificate of Library and Information Science
| |
| **** | CLIS | Christian Leadership Institute of Sudan
| |
| *** | CLIS | Carcinoma Lobulare in Situ
| |
| *** | CLIS | College of Information Studies
| |
| ** | CLIS | California Lumber Inspection Service
| |
| ** | CLIS | Coordinated Licensure Information System
| |
| * | CLIS | College of Library and Information Services
| |
| * | CLIS | Computerised Land Information System
| |
| * | CLIS | Closed-Loop Instrument System
| |
| * | CLIS | Commission Locale d'Information et de Surveillance
| |
| * | CLIS | Consortium for Latino Immigration Studies
| |
| * | CLIS | Classe d'Intégration Scolaire
| |
| * | CLIS | Council of Leading Islamic Scholars
| |
| * | CLIS | Corporate Library And Information Services
| |
| * | CLIS | Central Long Island Sound
| |
| * | CLIS | Calling Line Identification Signal
| |
| * | CLIS | Census Legislative Information System
| |
| * | CLIS | Comprehensive Logistics Information System
| |
| * | CLIS | CONTINENTAL LIFE and ACCIDENT CO.
| |
| * | CLIS | College of Library Info Services
| |
| * | CLIS | Col of Life Sciences
| |
| * | CLIS | Compensation and Liability Information System
| |
| * | CLIS | Childrens Learning in Science
| |
| * | CLIS | Cebuana Lhuillier Insurance Solutions
| |
| * | CLIS | Certificate in Library and Information Studies
| |