| Abbreviations | Meaning |
 | EFFO | European Foundation For Osteoporosis And Bone Disease |
| RHA | Rheumatoid Arthritis |
| FHD | Familial Histiocytic Dermatoarthritis; Family History Of Diabetes; Femoral Head Diameter |
| OCN | Oculomotor Nucleus; Oncology Certified Nurse; Osteocalcin |
| NBOME | National Board Of Osteopathic Medicine Examination |
| SOF | Study Of Osteoporotic Fractures [in Association With Strokes]; Superior Orbital Fissure |
| RO | Renal Osteodystrophy |
| NBM | No Bowel Movement; Normal Bone Marrow; Normal Bowel Movement; Nothing By Mouth |
| OV | Oculovestibular; Office Visit; Oncovirus; Osteoid Volume; Outflow Volume; Ovalbumin; Ovary; Overventilation; Ovulation |
| UDR-BMD | Ultradistal Radius Bone Mineral Density |
| NIAMDD | National Institute Of Arthritis, Metabolism, And Digestive Diseases |
| RAT | Repeat Action Tablet; Rheumatoid Arthritis Test; Right Anterior Trigone |
| ON | Occipitonuchal; Office Nurse; Olfactory Nucleus; Onlay; Optic Nerve; Orthopedic Nurse; Osteonecrosis; Osteonectin; Overnight |
| CAEV | Caprine Arthritis-encephalitis Virus; Chironomus Attenuatus Entomopoxvirus |
| VBNS | Very High Bandwidth Network Service; Very High-performance Backbone Network Services |
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