| Abbreviation | Definition |
|---|---|
| MPL | Memphis Public Libraries |
| MPL | Mesa Public Library |
| MPL | Milwaukee Public Library |
| MPL | Minneapolis Public Library |
| MPL | Mobile Payment Libraries |
| MPL | Mobile Public Library |
| MPL | Modular Pipeline Library |
| MPL | Mondamin Public Library |
| MPL | Moomau Public Library |
| MPLA | Mountain Plains Library Association |
| MPLD | Mahomet Public Library District |
| MPLD | Marengo Public Library District |
| MPLD | McHenry Public Library District |
| MPLD | Missouri Public Library Directors |
| MRC | Media Resource Centre |
| MRCL | Macaw Reusable Code Library |
| MRF | Mail reference Request Form |
| MRL | My Resource Library |
| MRLS | Mountain Regional Library System |
| MRPL | Maple Rapids Public Library |