Concurrent PC DOS

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Digital Research's Concurrent PC DOS was based on Concurrent DOS 3.2 (with BDOS 3.2) and released in 1984 for IBM PC compatible machines. It features compatibility with applications written for IBM PC DOS 2.0.


  • Intel 8086
  • 256 KB memory (512 KB recommended)
  • 2 floppy disk drives (harddisk recommended)


  • 1984: Concurrent PC DOS 3.2

It was replaced in October 1986 by Concurrent DOS XM.