Traditional Russian song used as a musical track on Tetris. Pynchon also referenced Tetris in Against the Day 
the li'l goombas of Web design
a reference to Super Mario Bros.
Fabian's Bit Bucket
In computing, the bit bucket is jargon for where lost computerized data has gone, by any means; any data which does not end up where it is supposed to, being lost in transmission, a computer crash, or the like, is said to have gone to the bit bucket — that mysterious place on a computer where lost documents go, as in: "What happened to that important spreadsheet that I was just editing?" OR "Oh, it went into the bit bucket." Wikipedia entry
A physician whose subway ads were all over the NYC subway for 30 years.