OATH
| Acronym | Definition |
|---|---|
| OATH | Open Authentication |
| OATH | Object Oriented Abstract Type Hierarchy |
| OATH | Office of Administrative Trials and Hearings (New York, NY) |
| OATH | Ontario Association of Trading Houses (Canada) |
| OATH | Organization of African Traditional Healers |
| OATH | Oswald and the Herringbones (band) |
| OATH | OK, Allow slack, Take up slack, Help (underground/underwater rescue using a tending line) |