| Abbreviation | Definition |
|---|---|
| LASER | London and South East Region (library) |
| LASSA | Library and Archival Studies Student Association |
| LAT | Los Angeles Times |
| Lat. | Latin |
| LATER | Library Academics Tutoring Enrichment And Recreation |
| LATI | Library Associates Training Institute |
| LATO | Library of Ancient Texts Online |
| LATS | Library Academic Technology Services |
| LATT | Library Association of Trinidad and Tobago |
| LBAC | Library Buildings Awards Committee |
| LBBM | Library Books by Mail |
| LBC | Library Binding Council |
| LBDL | Lizard Butte District Library |
| LBI | Library Binding Institute |
| LBIB | LehrerBIBliothek |
| LBPL | Long Beach Public Library |
| LBRB | Lorne Bair Rare Books |
| LBSS | Library Book Selection Service |
| LC | Library of Congress |
| LCA | Library Copyright Alliance |