H/O
| Acronym | Definition |
|---|---|
| H/O | History Of |
| H/O | History of (medical charting) |
| H/O | Home Owner |
| H/O | High Output |
| H/O | Head Office |
| H/O | Hold On |
| H/O | Home Office |
| H/O | Hand Over |
| H/O | Hang On |
| H/O | Half Ounce |
| H/O | Hurst/Olds (high-performance automobiles) |
| H/O | Hightest Offer |