A/O
| Acronym | Definition |
|---|---|
| A/O | At Once |
| A/O | As Of |
| A/O | Analog Output |
| A/O | Area of Operations |
| A/O | Alert and Oriented (charting a patient's mental status) |
| A/O | Acoustic/Optic (spectroscopy) |
| A/O | Accounting Only |
| A/O | Atomic Weight Percent |
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