This is a 1982 edition of 'Your Atari Computer: A Guide to Atari 400/800 Personal Computers,' published by OSBORNE/McGraw-Hill in Berkeley, California, USA. Authored by Lon Poole, Martin McNiff, and Steven Cook, it offers in-depth information about the programming and usage of Atari 400/800 computer systems. The guide showcases historical insight into early personal computing, making it a piece of computing history.