Computer Problem   I was having trouble with my computer. So I called Jimmy the computer guy, to come over.   Jimmy 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 error." I didn't want to appear stupid, but nonetheless inquired, "An, ID ten T error? What's that . in case I need to fix it again?" The computer guy grinned....   "Haven't you ever heard of an ID ten T error before?" "No," I replied. "Write it down," he said, "and I think you'll figure it out." So I wrote out ........ I D 1 0 T