John Vanderaart (born John L.M. van der Aart, 18 November 1962, Amsterdam) (also known as Doctor John or DRJ) is a Dutch games developer and writer. He studied computer science in Leiden.<ref name"control"/> In the 1980s, he became known because of his computer games for home computers such the Commodore 64, Sinclair ZX Spectrum and the MSX computers. He especially wrote educational software, action games and adventure games. He released his first games for the Dutch software house Radarsoft, which he founded with some of his study mates. He was one of the first Dutchmen who could earn his living by making computer games. Several of the games of Radarsoft were also released abroad. In 1986 he stopped at Radarsoft after releasing the game Hopeloos. The reason for this was because he thought the company's strategy was becoming too commercial-driven and he thought it was a pity that it wasn't about the computer games themselves anymore.<ref name"control"/> After the games era he became specialized in network technology. In 1995 he still made BASIC-listings for the magazine Eigen PC. He also wrote for LAN Magazine and he had a section in the twice weekly magazine Computer Idee under the alias FAQman. He also wrote several books about computer technology. Nowadays he gives advice and does troubleshooting for his own consultancy company. Several of his games * 1984 - Space Mates * 1984 - Topografie Wereld (with Cees Kramer) * 1985 - De Sekte * 1985 - Eindeloos (with Cees Kramer; also known as Endless) * 1985 - Nachtwacht (with Cees Kramer) * 1986 - Hopeloos (also known as Hopeless) * 1986 - Noach 3000 (Dossier Commodore) * 1987 - Zone VII: Part II * 1988 - Horror Hotel (reissue) * 1992 - Last in Amsterdam (reissue) Several of his books * Machinetaal voor MSX-computers, 1987, * AmigaDOS, 1989, * Het Amiga handboek, 1989, * Het MIDI handboek, 1990, * WordPerfect 5.1 toolkit, 1991 * Oplossingen voor Novell netwerken, 1992, * 97 tips voor Office 97, 1999, * Digitale Fotografie, 2004, * Senioren Megatips + DVD, 2004, * Werken met het Windows-register, 2005, * Leer jezelf Makkelijk een eigen webserver inrichten, 2006, * Leer jezelf snel een draadloos Wifi-netwerk opzetten, 2006, * Draadloze Thuisnetwerken, 2007, * MyStudy kant-en-klare Joomla ! toepassingen, 2007, * De Windows XP en Vista helpdesk. 2008, * Thuisnetwerken met Windows 7, 2010,
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