Computer Technician

While I was out with a friend for lunch yesterday, I got a call from my school asking where I was and why I wasn't home because the computer technician needed to look at my (their) computer and they couldn't get their keys to work in my door. This was the first I had heard about it. I was told that the technician had come from far away and that this was important, so I got home from lunch sooner than I would have. When the technician came, he seemed younger than I. He went to my office, took out a sheet of paper, and wrote down the serial numbers of my computer, printer and air conditioner and left.