I was having trouble with my computer. So I called Brad, the computer guy, to come over. Brad clicked a couple of buttons and solved the problem. He gave me a bill
for a minimum service call. As he was walking away, I called after him, “So, what was wrong?” He replied, “It was an ID ten T user error.” I didn’t want to appear stupid, but nonetheless inquired: “An ID ten T user error? What’s that … in case I need to fix it again?” Brad grinned. “Write it down,” he said, “and I think you’ll figure it out.” So I wrote out ……. I D 1 0 T.