| Abbreviation | Definition |
|---|---|
| OAM | Object Attribute Memory |
| OAM | Operation Administration And Maintenance |
| OAM | Operation And Maintenance |
| OAR | Original Aspect Ratio |
| OARS | Onsite Agent's Reference Set |
| OASIS | Ongoing Advancement of Standards for Information Search |
| OASIS | Online Aix Service Information Station |
| OASIS | Open and Active Specification of Information Systems |
| OASIS | Organization for the Advancement of Structured Information Standards |
| OAT | Object Attribute Traces |
| OAT | Oldest Active Transaction |
| OAV | Object Attribute Value |
| OAZ | Ones And Zeros |
| OB | Object Bus |
| OB | Other Board |
| OB | Output Block |
| OB | Overflow Bucket |
| OBDD | Ordered Binary Decision Diagram |
| OBF | OBFuscated C Code |
| OBH | Oregon BushHackers |