On a train to a large computer convention there was a group of computer engineers and a group of computer programmers.
The group of engineers had only ONE ticket for all of them. Each of the programmers had a train ticket. The programmers started laughing, figuring the engineers were going to get
caught and thrown off the train. One of the engineers said “here comes the conductor”, all of the engineers went into the bathroom. As normal the programmers were puzzled.
The conductor came aboard, said “tickets please” and got tickets from all the computer programmers. He then went to the bathroom and knocked on the door and said “ticket please”. One
engineer stuck the ticket under the door. The conductor took it and moved on. A few minutes later the engineers came out of the bathroom. The computer programmers were amazed.
On the way back from the convention, the group of programmers decided that they would try the engineer’s method. They bought one ticket for the whole group. The engineers were in the same car.
Again, the programmers started snickering at the engineers. This time NONE of the engineers had tickets. One of the Engineers said “Conductor coming!”, all the engineers went to one bathroom and all the computer programmers went to the other bathroom.
Before the conductor came on board, one of the engineers left their bathroom, knocked on the programmers bathroom, and said “ticket please.”