| Abbreviations | Meaning |
 | RSWA | Royal Society Of Western Australia |
 | RTECS | Registry Of Toxic Effects Of Chemical Substances [database] |
 | RTK NET | The Right-To-Know Network |
 | RTOG | Radiation Therapy Oncology Group |
 | RTP | Regulatory Toxicology And Pharmacology Journal |
 | RTSO | Respiratory Therapy Society Of Ontario. Société De La Thérapie Respiratoire De L'Ontario |
 | RVC | Royal Veterinary College |
 | RVCZS | Royal Veterinary College Zoological Society |
 | RWJF | The Robert Wood Johnson Foundation |
 | S.O.F.T AUSTRALIA | Support Organisation For Trisomy In Australia |
 | S.O.F.T U.K. | Support Organisation For Trisomy 13/18 And Related Disorders |
 | SA | Schizophrenics Anonymous |
 | SA | Surgical Assistant |
 | SA WISE | Association Of South African Women In Science And Engineering |
 | SAA | Spondylitis Association Of America |
 | SAAAPA | Student Academy Of The American Academy Of Physician Assistants |
 | SAACB | South African Association Of Clinical Biochemists |
 | SAAD | Society For The Advancement Of Anaesthesia In Dentistry |
 | SAAVT | South African Association Of Veterinary Technologists |
 | SABA | Society For The Advancement Of Behavior Analysis |
 | SABPAC | SOPHE/AAHE Baccalaureate Program Approval Committee |
 | SAC | Standards For Ambulatory Care |
 | SACGHS | Secretary's Advisory Committee On Genetics, Health And Society. National Institutes Of Health. |
 | SACGT | Secretary's Advisory Committee On Genetic Testing. National Institutes Of Health. |
 | SACME | Society For Academic Continuing Medical Education |
 | SACOW | Surgical Aid To Children Of The World |
 | SACX | Secretary's Advisory Committee On Xenotransplantation. National Institutes Of Health. |
 | SAD | Sociedad Argentina De Dermatología |
 | SADA | South-African Dental Association |
 | SADD | Students Against Drunk Driving |
 | SADHA | Student Member Of The American Dental Hygienists Association |
 | SADJ | South-African Dental Association Journal |
 | SAED | Scandinavian Academy Of Esthetic Dentistry |
 | SAEM | Society For Academic Emergency Medicine |
 | SAF | Schizophrenia Australia Foundation |
 | SAFE | Smokefree Air For Everyone |
 | SAFETY | Sun Awareness For Educating Today's Youth |
 | SAFIR | Société De L'Association Française Des Implants Et De La Chirurgie Réfractive |
 | SAFPA | Society Of Air Force Physician Assistants |
 | SAGES | Society Of American Gastrointestinal And Endoscopic Surgeons |
 | SAGES | South African Gastroenterology Society |
 | SAGRI | Substance Abuse, Growth And Recovery Institute |
 | SAHLA | Southern Alberta Health Libraries Association |
 | SAHMS | Southern Association For The History Of Medicine And Science |
 | SAHNOS | South African Head And Neck Oncology Society |
 | SAHO | Saskatchewan Association Of Health Organizations |
 | SAID | Society Of American Indian Dentists |
 | SAIEH | South African Institute Of Environmental Health |
 | SAIOH | Southern African Institute For Occupational Hygiene |
 | SAIRS / AHRIS | Système Automatisé D'Information Sur La Recherche En Santé / Automated Health Research Information System |