Telnet
The task was to access a record from a university library. This is something I vaguely remember doing for real, back in the day.
I tried to entering telnet://library.deakin.edu into Opera (my usual web browser) and it started up the telnet client that comes with Windows XP and logged into the telnet site. As Opera isn't on the list of browsers supported by WebCT, I tried the same thing in Internet Explorer (version 7) and nothing happened, so after doing some googling, discovered that, although Telnet is supported in this version, it is disabled by default. After more googling, I found a quick fix that re-enables it by modifying the Windows registry. http://library.osu.edu/sites/it/CSS/faqtips/ie7_telnet_fix.php
I got this screen after entering telnet://library.deakin.edu into IE7.
This is the result screen after searching for author name "Bennahum".
And finally, for a bit of old fashioned nerd fun
telnet://towel.blinkenlights.nl