I'm not sure where to put this nor who might be interested but Amazon still has some old DOS manuals.http://www.amazon.co...+Guide+and+Reference
I have the original manual for MS-DOS 5 and it contains lots of answers!
It's about an inch thick with 668 pages. An invaluable treasure for commandline-junkies.
I have another, about the same size, The Waite Group's, Tricks of the MS-DOS Masters. I didn't check Amazon for this one but the prices for the Microsoft manuals make them affordable, and if you play on the command line, desirable.