Q: How many Technicians does it take to change a light bulb?
A: Only one but there are always four Supervisors there to pull the ladder out from under him/her.
Q: How many Supervisors does it take to change a light bulb?
A': Just one, provided there's an Technician around to explain how to do it.
Q: How many First Card Techs does it take to screw in a light bulb?
A: Just one. He/She grabs the bulb and waits for the world to revolve around him/her.