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True BASIC is a variant of the BASIC programming language descended from Dartmouth BASIC - the original BASIC - invented by college professors John G. Kemeny and Thomas E. Kurtz.
When True BASIC appeared on the market in 1985, initially based on Dartmouth BASIC 7 - otherwise known as ANSI BASIC - it implemented a number of new features over QBasic, and allowed the user a redefinable 16-color, 640x480 pixel backdrop for program editing. True BASIC introduced new functions for graphics primitives like plot, plot area, flood, etc. It also was the first to provide a method for saving a portion of the screen and blitting it elsewhere, but had no proper buffering implementation.
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