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IBM PC DOS
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=== {{anchor|7.00}}PC DOS 7 === PC DOS 7 was released in April 1995 and was the last release of DOS before IBM software development (other than the development [[IBM ViaVoice]]) moved to Austin. The [[REXX]] programming language was added, as well as support for a new floppy disk format, [[IBM Extended Density Format|XDF]], which extended a standard 1.44 MB floppy disk to 1.86 MB. SuperStor disk compression technology was replaced with [[Stac Electronics]]' [[STACKER]]. An algebraic command line calculator and a utility program to load device drivers from the command line were added. PC DOS 7 also included many optimizations to increase performance and reduce memory usage.<ref name="retro"/>
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