http://www.cryst.bbk.ac.uk/education/Internet/network/Telnet.html:
do they all have a Vax account?

http://www.cryst.bbk.ac.uk/education/Internet/hypertext/Hypertext.html:
change Mosaic references to Netscape.

http://www.cryst.bbk.ac.uk/education/Internet/www/Doc_Access.html
ditto