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John Aker is designer of the [[Chafitz Modular Game System|Modular Game System]] aka the [[Great Game Machine]], as well author and co-author of various [[Dedicated Chess Computers|dedicated chess computers]] and [[Module|modules]] for these systems. He worked along with [[David Slate]], [[Larry Atkin]], [[Alan Mead]], [[Terry Fredrick]], and [[John Jacobs]] <ref>[http://www.computerhistory.org/chess/full_record.php?iid=doc-431614f6ce737 The Twelfth ACM's North American Computer Chess Championship], [http://archive.computerhistory.org/projects/chess/related_materials/text/3-1%20and%203-2%20and%203-3.1981_ACM_NACCC/1981_ACM_NACCC.sm.062303017.pdf pdf] from [[The Computer History Museum]]</ref> on the [[Boris#X|Boris X]] and [[Morphy]] program, and the ''[[Destiny Prodigy'' ]] <ref>[http://www.schach-computer.info/wiki/index.php/Chafitz_Destiny Chafitz Destiny] from [http://www.schach-computer.info/wiki/index.php/Hauptseite_En Schachcomputer.info Wiki] (German and English)</ref> <ref>[http://www.spacious-mind.com/html/destiny_prodigy.html Chafitz Destiny Prodigy Electronic Chess Computer] from [[The Spacious Mind]]</ref>.