PADI (Professional Association of Diving Instructors) is the world's largest recreational diving membership organization. The membership includes dive businesses, resort facilities, academic institutions, instructor trainers, dive educators, divers, snorkelers and other watersports. Professional PADI Members (dive centers, resorts, educational facilities, instructors, assistant instructors and divemasters) teach the vast majority of the world's recreational divers, issuing approximately 1,000,000 dive certificates each year. PADI has offices in Australia, Canada, Japan, Norway, Sweden, Switzerland, the UK and the USA. PADI Worldwide, the corporate head office, is located in California, USA. PADI's offices serve more than 100,000 individual professional members and more than 4,300 dive centers and resorts in more than 175 countries. To serve the needs of divers worldwide, translations of PADI materials are available in more than 20 languages. Except for educational materials and training aids PADI provides many services to its members.