| Abbreviation | Definition |
|---|---|
| HML | Human Metabolome Library |
| HMLA | Hudson Mohawk Library Association |
| HMLE | Historic Munhall Library Estates (Munhall, PA) |
| HMML | Hill Museum & Manuscript Library |
| HMML | Hill Museum Manuscript Library |
| HMRC | Houston Metropolitan Research Center |
| HMRC | Hydraulics and Maritime Research Centre (University College Cork) |
| HOLLIS | Harvard On Line Library Information System |
| HOTE | Handbooks for Old Testament Exegesis |
| HPGL | High Perfomance Geostatistics Library |
| HPGL | High Performance Geostatictics Library |
| HPGL | High Performance Geostatistics Library |
| HPL | Hamilton Public Library |
| HPL | Hartford Public Library |
| HPL | Hedberg Public Library |
| HPL | Henrietta Public Library |
| HPL | Heterogeneous Programming Library |
| HPL | Houston Public Library |
| HPL | Huntington Public Library |
| HPL | Huntsville Public Library |