OCO
OCO was an open source software development group at the University of Waterloo. After we built some software to help the co-op department run the continuous phase of job matching, we naturally made t-shirts.
We took the opportunity to poke fun at co-op department’s lethargic development processes:

A few folks were afraid of offending the administration, so they opted for version two, emphasizing the openness of our open source process:

WatBowl
The Waterloo Quiz Bowl (trivia) club gave these shirts to the winners of its third tournament:
