Another "easter egg", this time, simply an uninspired name for an application when upgrading from 7.3 to 8.3 :-).
$ SHOW SYSTEM
OpenVMS V8.3 on node VMS 4-MAR-2008 23:56:17.19 Uptime 0 00:15:41
And of course, the classics (All Your Base Are Belong to Us!).
$ EXIT %xb70
%SYSTEM-W-FISH, my hovercraft is full of eels
$ EXIT 134002
%DEBUG-E-FISH, my hovercraft is full of eels
$ EXIT %x3f30074
%KATIE-F-DEVNOTMBX, device is not a mailbox
$ EXIT %x34b4
%SYSTEM-F-GAMEOVER, all your base are belong to us
All your OpenVMS Easter Eggs are belong to us :-).