Ha! I can top some of these!
I worked as a computer programmer in a fairly large company. The company was prospering, so a new wing was added to house the entire order entry department. The huge move was orchestrated and timed minutely, to minimize disruption to the company. The day of the move everything was going as scheduled. I got a call from the order entry supervisor complaining that her computer wasn't working. I immediately travelled to the beautiful new area of the building, sat down at her desk, and mentioned that her computer didn't seem to be getting any power. I checked the cord, found it wasn't plugged in, and asked where the nearest electrical outlet was. That's when the supervisor asked "You mean it needs electricity?" And that's when I found that none of the cubicles for the order entry people in this new wing of the building were wired for electricity.