| 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 |