Reference card(s) for UNIX available?

[Piet Tutelaers]

We try to promote packages by providing a free reference card to our
users. To promote UNIX (it has to be promoted!) we would like to know
if there exist reference cards for important topics within UNIX. A
reference card should be as compact as possible with a maximum of two
A4's. 

The topics I am thinking about are:
 - UNIX in general (beginner commands perhaps)
 - a VI reference card (for emacs there is a splendid reference card)
 - the usage of UseNet with `nn'
 - and what else?

--Piet

uucp:   rcpt at urc.tue.nl       | Piet Tutelaers        Room  RC 1.82
bitnet: rcpt at heithe5.BITNET   | Eindhoven University of  Technology
phone:  +31 (0)40 474541      | P.O. Box 513, 5600 MB Eindhoven, NL