| Abbreviation | Definition |
|---|---|
| INFCIRC | International Atomic Energy Agency Information Circular |
| INFOLIT | INFOrmation LITeracy |
| INI | International Nursing Index |
| INR | Morrison-Reeves Public Library, Richmond, Indiana |
| INRM | Morrison-Reeves Public Library, Richmond, Indiana |
| INRO | Roachdale Public Library, Roachdale, Indiana |
| IntArchArbeitsmed | Internationales Archiv for Arbeitsmedizin (Berlin) |
| IntJAbnormDevelop | The International Journal of Abnormal Development |
| IntJAirPollut | International Journal of Air Pollution |
| IntPolymerSciTech | International Polymer Science and Technology |
| IOC | ISDN Ordering Code |
| IOSM | India Office Select Materials |
| IPA | International Persian Alphabet |
| IPAL | Integrated Process Asset Library |
| IPKL | Interactive Project Knowledge Library |
| IPL | Indie Photobook Library |
| IPL | Internet Public Library |
| IPL | Interoperable PDK Libraries |
| IPLF | India Public Library Fund |
| IPUMS | Integrated Public Use Microdata Series |