| Abbreviations | Meaning |
 | ISID | International Society For Infectious Diseases |
 | ISIE | International Society For Imaging In The Eye |
 | ISIS | Institute Of Science In Society |
 | ISIS | International Society On Infant Studies |
 | ISIS | International Spinal Injection Society |
 | ISJ | Internet Science Journal |
 | ISKO | International Society For Knowledge Organization |
 | ISLD | International Society For Lasers In Dentistry |
 | ISM | Information Santé Multimédia. Information System Medical. Informations System Für Die Medecine. Información Sistema Médico |
 | ISMC | International Society Of Motor Control |
 | ISMC | EFMC International Symposium On Medicinal Chemistry |
 | ISMICS | International Society For Minimally Invasive Cardiothoracic Surgery |
 | ISMP | Institute For Safe Medication Practices |
 | ISMRM | International Society For Magnetic Resonance In Medicine |
 | ISMS | Indian Society For Medical Statistics |
 | ISN | International Society Of Nephrology |
 | ISNA | Intersex Society Of North America |
 | ISNCC | International Society Of Nurses In Cancer Care |
 | ISNG | International Society Of Nurses In Genetics |
 | ISNI | International Society Of NeuroImmunology |
 | ISNIM | International Society For NeuroImmunoModulation |
 | ISOA | Irish Society Of Obstetric Anaesthesia |
 | ISOBM | International Society For Oncodevelopmental Biology And Medicine |
 | ISODP | International Society For Organ Donation And Procurement |
 | ISOM | International Society For Orthomolecular Medicine |
 | ISONG | International Society Of Nurses In Genetics |
 | ISOO | International Society For Oral Oncology |
 | ISOO | International Society Of Online Ophthalmologists |
 | ISOPP | International Society Of Oncology Pharmacy Practitioners |
 | ISOQOL | International Society For Quality Of Life Research |
 | ISOST | Internet Society Of Orthopaedic Surgery And Trauma |
 | ISOT | International Society Of Ocular Toxicologoy |
 | ISP | Infirmiers De Secteur Psychiatrique |
 | ISPCLN | International Society Of Psychiatric Consultation-Liaison Nurses |
 | ISPD | Illinois Society Of Pediatric Dentists |
 | ISPD | International Society For Peritoneal Dialysis |
 | ISPE | International Society For Pharmacoepidemiology |
 | ISPED | Institut De Santé Publique, D'Épidémiologie Et De Développement |
 | ISPEN | Indian Society For Parenteral And Enteral Nutrition |
 | ISPN | International Society Of Psychiatric-Mental Health Nursing |
 | ISPNO | International Symposium On Pediatric Neuro-Oncology |
 | ISPO | International Society For Preventive Oncology |
 | ISPOR | International Society For Pharmacoeconomics And Outcomes Research |
 | ISPP | International Society Of Political Psychology |
 | ISPS | International Society For The Psychological Treatments Of The Schizophrenias And Other Psychoses |
 | ISPS | International Society Of Police Surgeons |
 | ISQOLS | International Society For Quality-of-Life Studies |
 | ISQUA | International Society For Quality In Health Care |
 | ISR | International Society Of Radiology |
 | ISREC | Institut Suisse De Recherche Expérimentale Sur Le Cancer. Schweizerisches Institut Für Experimentelle Krebsforschung. Swiss Institute For Experimental Cancer Research. |