| Abbreviations | Meaning |
 | SIM | Society For The Internet In Medicine |
 | SIMBAD | Système D'Information Médicale Et De Bureautique Appliqué Au Dossier Médical |
 | SIMDUT / WHMIS | Système D'Information Sur Les Matières Dangereuses Utilisées Au Travail / Workplace Hazardous Materials Information System |
 | SIMMOC | Società Italiana Di Microbiologia Medica, Odontoiatrica E Clinica |
 | SIN | Società Italiana Di Nefrologia |
 | SINET | Ethiopian Journal Of Science |
 | SINPE | Società Italiana Di Nutrizione Artificiale E Metabolismo |
 | SIOG | Société Internationale D'Oncologie Gériatrique. International Society Of Geriatric Oncology |
 | SIOP | Société Internationale D'Oncologie Pédiatrique. International Society Of Paediatric Oncology |
 | SIOP | Society For Industrial & Organizational Psychology |
 | SIPMO | Società Italiana Di Patologia E Medicina Orale |
 | SIPRE | Società Italiana Di Psicoanalisi Della Relazione |
 | SIR | Society Of Interventional Radiology |
 | SIRS | Santé, Inégalités, Ruptures Sociales. Health, Inequalities, Social Disruptures |
 | SIS | National Library Of Medicine Specialized Information Services |
 | SIS | Système D'Information De Santé |
 | SISBOP | Syndicat Des Infirmières Spécialisées En Bloc Opératoire |
 | SISC | Società Italiana Per Lo Studio Delle Cefalee |
 | SITP | Société Internationale De Thérapie Psychomotrice |
 | SIU | Societá Italiana Di Urologia |
 | SIUMB | Società Italiana Di Ultrasonologia In Medicina E Biologia |
 | SIVA UK | UK Society For Intravenous Anaesthesia |
 | SIVB | Society For In Vitro Biology |
 | SIVE | Società Italiana Veterinari Per Equini |
 | SIVELP | Sindacato Italiano Veterinari Liberi Professionisti |
 | SIXI | Soins Infirmiers Et Informatique |
 | SJR | SCImago Journal & Country Rank |
 | SKJP / ASPEA / ASPEE | Schweizerische Vereinigung Für Kinder- Und Jugendpsychologie / Association Suisse De Psychologie De L'Enfance Et De L'Adolescence / Associazione Svizzera Di Psicologia Dell'Età Evolutiva |
 | SLA / ALS | Société Canadienne De La Sclérose Latérale Amyotrophique / Amyotrophic Lateral Sclerosis Society Of Canada |
 | SLADP | Sociedad Latinoamericano De Dermatología Pediátrica |
 | SLAITS | State And Local Area Integrated Telephone Survey |
 | SLB | Society For Leukocyte Biology |
 | SLMS | Svenska Laser-Medicinska Sällskapet. Swedish Laser-Medical Society |
 | SLODF | Société Luxembourgeoise D'Orthopédie Dento-Faciale |
 | SLS | Society Of Laparoendoscopic Surgeons |
 | SLS | Specialist In Laboratory Safety |
 | SLTC | Standards For Long Term Care |
 | SMA | Singapore Medical Association |
 | SMA | Southern Medical Association |
 | SMA | Sports Medicine Australia |
 | SMBE | Society For Medical And Biological Engineering |
 | SMCA / CSAM | Société Médicale Canadienne Sur L'Addiction / Canadian Society Of Addiction Medicine |
 | SMD | Société De Mèdecine Dentaire |
 | SMDM | Society For Medical Decision Making |
 | SMFM | Society For Maternal-Fetal Medicine |
 | SMGP | Schweizerischen Gesellschaft Für Phytotherapie |
 | SMHP | Société Médical Des Hôpitaux De Paris |
 | SMI | Society For Mucosal Immunology |
 | SMIL | Skandinavisk Medisinsk Informasjen For Legfolk. Scandinavian Medical Information For The Public. |
 | SMIT | Society For Medical Innovation And Technology |