| Acronym | Meaning |
 | OR | Operating Room (surgery) - Operational/Operations Research -Oregon (postal Symbol) |
| CMHC | Canada Mortgage And Housing Corporation |
| NOW | National Organization For Women |
| TR | Turkish Language (ISO 639-1 Code) |
| BU | Bulgaria (FIPS 10-4 Country Code) - Burma (ISO 3166 Digram; Obsolete Since 1989) |
| SM | Samarium |
| MRI | Magnetic Resonance Imaging |
| CINC | Commander In Chief |
| PRN | Pro Re Nata (Latin |
| FJ | Femtojoule |
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