When I was in undergrad it used to drive me nuts when I sat down at a terminal and the switches to `ls` or `ps` didn't work how I expected, and then I had to lo

When I was in undergrad it used to drive me nuts when I sat down at a terminal and the switches to `ls` or `ps` didn't work how I expected, and then I had to look them up. Things didn't seem appreciably different in a way that was interesting or useful, just different for the sake of difference.