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BASIC A+

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The BASIC A+ programming language was developed by Optimized System Software of Cupertino, California, to provide the Atari 8-bit family with an extended BASIC compatible with, but faster than, the simpler ROM-based ATARI BASIC.

While ATARI BASIC came on an 8 KB ROM cartridge, BASIC A+ was delivered on disk and took 15 KB of the computer's RAM, leaving 23 KB available for user programs in a 48 KB Atari 800. BASIC A+ was offered at a price of US$80.00 in 1983, including the products OS/A+ and EASMD (Editor/Assembler), and being an extension of ATARI BASIC, came with a supplement to the latter's reference manual as its documentation. In addition to being faster than its ROM-bound counterpart, BASIC A+ provided a number of extra commands for DOS operations, Player/Missile graphics, and debugging.