| Abbreviation | Definition |
|---|---|
| HHSL | Hirsh Health Sciences Library |
| HI | Health Information |
| HIL | Harriet Irving Library |
| HISP | Health Information Service Provider |
| HKCL | Hong Kong Central Library |
| HKLG | Hong Kong Libraries Gateway |
| HKPL | Hawaii Kai Public Library |
| HKPL | Hong Kong Public Libraries |
| HL | Hamilton Library |
| HLC | Harrington LIbrary Consortium |
| HLC | Hawaii LIbrary Consortium |
| HLDI | Harvard Library Digital Initiative |
| HLGT | High-Level Group Terms (MedDRA) |
| HLQ | Huntington Library Quarterly |
| HLS | HMW Library System |
| HLS | Hospital Libraries Section |
| HLT | High-Level Terms (MedDRA) |
| HMB | Half Moon Bay |
| HML | Hawaii Medical Library |
| HML | Henry Madden Library |