Three Microsoft software engineers and three IBM software engineers are traveling by train to a conference. At the station, the three IBM software engineers each buy tickets and watch as the three Microsoft software engineers buy only a single ticket.
“How are three people going to travel on only one ticket?” asks one of the IBM programmers.
“Watch and you’ll see,” answers the Microsoft programmer.
They all board the train. The IBM software engineers take their respective seats but all three Microsoft software engineers cram into a restroom and close the door behind them.
Shortly after the train has departed, the conductor comes around collecting tickets. He knocks on the restroom door and says, “ticket, please.” The door opens just a crack and a single arm emerges with a ticket in hand. The conductor takes it and moves on.
The IBM software engineers witness all this and agreed it was quite a clever idea. So after the conference, the IBMers decide to copy the Microsofties on the return trip and save some money.
When they get to the station, they buy a single ticket for the return trip. To their astonishment, the Microsoft programmers don’t buy a ticket at all.
“How are you going to travel without a ticket?” asks one of the perplexed IBM employees.
“Watch and you’ll see,” answers one of the Microsoft programmers.