DOS 5 with 'Quick Menu'! :-)
I never could remember all the DOS commands. Have to look then up on the net just to remember what to use, when I want to do some registry work. Threw out all my books long ago. Thought I would never need to type a DOS command again. Fool that I am.
I just don't understand everyone's problem with wiping disc's and Hard Drives clean, I seem to be able to do it just by deleting spam E-mail.