ftp://ftp.is.co.za/rfc/rfc1808.txt gopher://spinaltap.micro.umn.edu/00/Weather/California/Los%20Angeles http://www.math.uio.no/faq/compression-faq/part1.html mailto:mduerst@ifi.unizh.ch news:comp.infosystems.www.servers.unix telnet://melvyl.ucop.edu/