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by peteri 4466 days ago
Err MSDOS was a rough CP/M clone and CP/M did have drive letters. CP/M picked up some stuff from RSX-11 (pip for example http://en.wikipedia.org/wiki/Peripheral_Interchange_Program) and that's why the Windows/MSDOS command option is usually / as it was on a pdp-11 (backwards compatibility to BEFORE unix)