Association RDF
pages:- International Dyslexia Association
- International Honorary Sorority for Women Educators
- International Network on Appropriate Technology (INAT)
- International Peace Research Association
- International Political Science Association (IPSA)
- International Society for Exploring Teaching Alternatives
- International Society for Limnology
- International Society for Reef Studies
- International Society for Tropical Ecology
- International Society of Language Studies (ISLS)
- International Society of Microbial Ecology
- International Studies Association
- International Symbiosis Society
- International Union of Pure and Applied Chemistry
- International Union of Pure and Applied Chemistry (IUPAC)
- International Water Resources Association (IWRA)
- International Zeolite Association
- IOOS Association
- IUPAC-Puerto Rico Program
- Junta Examinadora de Quimicos, PR
- Latin American Studies Association
- Latinas in Computing
- Lawyer's College of Puerto Rico
- Licensed Master Bird-Bander
- Liga Ecologica del Noroeste
- Local Delta Chapter
- Lousiana Engineering Society
- MAES - Latinos in Science
- Marine Technology Society
- Materials Research Society