Diving organizations :

CMAS - Confederation Mondiale des Activites Subaquatiques
AIDA - Association Internationale pour le Développement de l'Apnée

Diving schools :

AA - Apnea Academy
ANDI - American Nitrox Divers International
GUE - Global Underwater Explorers
IANTD - International Association of Nitrox and Technical Divers
NAUI - National Association of Underwater Instructors
PADI - Professional Association of Diving Instructors
PSS - Professional Scuba Schools
SSI - Scuba Schools International
TDI - Technical Divers International
TSA - Trimix Scuba Association
UDI - United Diving Instructors

Other:

SLOVENSKO MORJE - Slovenian sea Portal
MLAS - Maritime Law Association of Slovenia
DAN - Divers Alert Network - Europe
OXYNET - Hyperbaric Oxygen Therapy and diving medicine