It implements a number of new features over QBASIC, and allowed the user a 16 color (redefinable), 640x480 backdrop for programming, and introduced new functions for 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 else where, but had no proper buffering implementation.
There are versions for DOS, Windows and Macintosh. External Link
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