| Abbreviations | Meaning |
 | SMDS | Secondary Myelodysplastic Syndrome; Switched Multimegabit Data Service |
 | ORC | Oculo-reno-cerebellar [syndrome] |
 | HPNS | High Pressure Neurologic Syndrome |
 | CFIDS | Chronic Fatigue And Immune Dysfunction Syndrome |
 | GP | Goodpasture Syndrome |
 | HVUS | Hypocomplementemic Vasculitis Urticaria Syndrome |
 | DPS | Descending Perineum Syndrome |
 | BLS | Blind Loop Syndrome |
 | IADHS | Inappropriate Antidiuretic Hormone Syndrome |
 | OHS | Ocular Histoplasmosis Syndrome |
 | MMM | See 3-M [syndrome] |
 | LGL | Large Granular Leukocyte; Large Granular Lymphocyte; Lown-Ganong-Levine [syndrome] |
 | HSES | Hemorrhagic Shock-encephalopathy Syndrome |
 | MSW | Mallory-Weiss Syndrome |
 | RW | Radiological Warfare; Ragweed; Respiratory Work; Romano-Ward [syndrome]; Round Window |