Team 2108 (Team Awkward Turtle) created a tradition our first year of naming our robots "Zippy" since we used so many zip-ties on the first robot (that's another story in itself...)
2007: Zippy T. Turtle
2008: Zippy T. 2
2009: Zippy 3 (Z3)
2010: Zippy 4 ("Zed 4")
The last two years, we have dropped the "T." part, and also created a nickname by which the team refers to the robot. This year, it was decided that since I am the captain and am English, and since the English pronounce the letter Z "zed", that we would refer to Zippy 4 as "Zed 4"
Rob.