| Abbreviation | Definition |
|---|---|
| CIL | Communications in Information Literacy |
| CIL | Computers in Libraries |
| CIL | Core Imaging Library |
| CILA | Commission for International Library Assistance |
| CILC | California Indian Library Collections |
| CILIPS | Chartered Institute of Library and Information Professionals in Scotland |
| CIN | Computers in Nursing |
| CIN | Computers, Informatics, Nursing |
| CINAHL | Cumulative Index to Nursing and Allied Health Literature |
| CIOC | Community Information Online Consortium |
| CIPL | Cayman Islands Public Libraries |
| CIPL | Children of Incarcerated Parents Library |
| circ | circulation |
| circ. | circulating |
| CISL | Columnstore Indexes Scripts Library |
| CJCL | California Judicial Center Library |
| CJCN | Canadian Journal of Cardiovascular Nursing |
| CJO | Cambridge Journals Online |
| CJRLC | Central Jersey Regional Library Cooperative |
| CL | Component Library |