| Abbreviations | Meaning |
 | OS | Osteosclerosis |
 | FOS | Finnish Osteoporosis Society (EFFO Member Society) |
 | SOC | Syphilitic Osteochondritis |
 | OMT | Object Modeling Technique; Ocular Microtremor; O-methyltransferase; Ophthalmic Medical Technician Or Technologist; Osteopathic Manipulative Therapy |
 | IBMTR | International Bone Marrow Transplantation Registry |
 | OCD | Osteochrondritis Dissecans |
 | ODD | Oculodentodigital [dysplasia]; Oppositional Defiant Disorder; Osteodental Dysplasia |
 | RAO | Right Anterior Oblique; Right Anterior Occipital; Rotational Acetabular Osteotomy |
 | DBP | Demineralized Bone Powder |
 | BM | Bone Marrow |
 | DO | Doctor Of Osteopathy |
 | TBBM | Total Body Bone Minerals |
 | JRA | Juvenile Rheumatoid Arthritis |
 | VRO | Vertical Ramus Osteotomy |
 | RASS | Rheumatoid Arthritis And Sjögren Syndrome |