Education
Keller studied philosophy, mathematics, and theoretical physics at the University of Zurich.
Keller studied philosophy, mathematics, and theoretical physics at the University of Zurich.
In 1962, he reached a depth of 1,000 feet (300 m) in open ocean. In the 1970s through the 1980s, Keller made himself a name as an entrepreneur in the Information Technology industry. Keller is also an amateur classical pianist who produced two CDs and occasionally performed for audiences of up to 2000 people.
He became interested in deep diving and developed tables for mixed-gas decompression, supported by Albert A. Bühlmann who suggested suitable gases.
Keller successfully tested his idea in Lake Zurich, where he reached a depth of 400 feet (120 m), and Lake Maggiore, where he reached a depth of 728 feet (222 m). On December 3, 1962, he set a new world record when he reached a depth of 1,000 feet (300 m) off the coast of Santa Catalina Island, California, together with Peter Small.
In the following years, navies and hospitals bought decompression chambers constructed by Keller. In the 1970s, Keller sold his own line of computers and in the 1980s became a leading vendor of International Business Machines Corporation PCs in Switzerland.
He developed a series of software products (Witchpen, Ways for Windows, and Wizardmaker) which provided automatic spell checking, literal machine translation, and macro recording.
He now runs Visipix the largest fine art and photo museum online with 1.3 million exhibits, all with free copyrights for any use. Since 2005, Keller has been a full-time artist. In 2009, Keller joined the advisory board for the United States Historical Diving Society.
Keller, H (1975).
"Diving 2001. presented at Oceans 2000 in 1973.". South Pacific Underwater Medicine Society Journal 5 (3). ISSN 0813-1988. Online Computer Library Center 16986801.
Retrieved 2008-2009-12.