›  This is the Turbo Basic Interpreter.›This is the one that runs on XL and›XE series machines; see Frost Basic›for the version that runs on older›(800 series) hardware.  ›  This program is much more feature-›full than Atari Basic, and is reputed›to be completely upward compatible,›as well as 3-5 times faster.›  Also see the Turbo Basic compiler,›the compiler and runtime system for›a 10-15 (!) times speed improvement.›