Michael Erlewine is an internationally-known astrologer, the first to program astrology on microcomputers and make those programs available to the world. Erlewine has published scores of books and has been practicing astrology for over 50 years. Erlewine is also an Internet pioneer and well-known archivist of popular culture, founding the largest music database in world (AllMusic.com), one of the two largest movie databases (AllMovie.com), the largest Rock n' Roll concert poster database, ClassicPosters.com), and many other sites. Erlewine has studied Buddhism since the 1950s and practiced it for last forty years, running the Heart Center for meditation instruction since the 1980s. Trained in the Karma Kagyu system of Tibetan Buddhism, Erlewine has practiced Mahamudra Meditation for 27 years under the guidance of senior Tibetan Karma Kagyu teachers.