| HELP | Hawaii early learning profile; Health Education Library Program; Health Emergency Loan Program; Heal... |
|---|---|
| LD | labor and delivery; laboratory data; labyrinthine defect; lactate dehydrogenase; laser Doppler; lear... |
| H&L | heart and lung [machine] |
| MARC | machine-readable cataloging; multifocal and recurrent choroidopathy |
| MRAB | machine-readable archives in biomedicine |