| Abbreviation | Definition |
|---|---|
| ILOR | Internet Library Of Reference |
| ILS | Information and Library Science |
| ILS | Integrated Library System |
| ILS | integrated library systems |
| IM | Index Medicus |
| IMCPL | Indiana Marion County Public Library |
| IMCPL | Indianapolis Marion County Public Library |
| IMCW | Information Management in a Changing World |
| IMGL | Idealized Molecular Geometry Library |
| IMPACT | Information Management of Public Access to Computer Terminals |
| IMSL | Imslinternational Mathematical And Statistical Libraries |
| IMSL | International Mathematical and Statistical Libraries |
| IMSL | International Mathematical Subroutine Library |
| IMSL | The International Mathematical And Statistical Libraries |
| IMSLP | International Music Score Library Project |
| IndEngChem | Industrial Engineering Chemistry |
| IndHygNewsletter | Industrial Hygiene Newsletter |
| IndianJExpBiol | Indian Journal of Experimental Biology (New Delhi) |
| IndMed | Industrial Medicine |
| IndMedSurg | Industrial Medicine and Surgery |