When I was an undergraduate biology student in 1991 a suitemate told me I should go to some desk in some building over by Muir and get an account on the VAX. There were strange rooms all over campus that were open 24/7 and were loaded with green and amber screen terminals with integrated keyboards. Lots of sessions for CS lectures were held in these rooms and there was always interesting notes on the white boards (most rooms still had black boards or green boards, but think the chalk was too dusty so these rooms usually had the white boards.

Once I saw an instruction that was circled with an arrow pointing to is that said:

  man man
  man -k -or- apropos

I just typed `man man` in a terminal on my Mac, and luckily its still there.