I don't - and in fact I finally got around to creating a HN account in order to ask you. Googling that just leads me back to this discussion. What's it from?
If you have an ACM subscription, the sheet music was published in Communications of the ACM (Volume 27, Issue 4; April 1984): http://dl.acm.org/citation.cfm?id=1035691
It references "The TELNET Song" by Guy L. Steele (a.k.a The Great Quux). The original is about Telnet, and given the subject of discussion, the reference seemed a natural one to make.
I am not sure, but it looks vaguely familiar. There is a text-based game called adventure game called Dunnet where you come across a CPU card, and do some stuff with it later on. As far as I remember, the game predates SSH, so the game either had Telnet or FTP. My memory fades.
