Young Judy was having trouble with her computer. So she called Tony, the computer guy, over to her desk. Tony clicked a couple buttons and solved the problem.

As he was walking away, Judy called after him, “So, what was wrong?” And he replied, “It was an ID Ten T Error.”

A puzzled expression ran riot over Judy’s face. “An ID Ten T Error? What’s that … in case I need to fix it again?” He gave her a grin, “Haven’t you ever heard of an ID Ten T Error before?” “No,” replied Judy. “Write it down,” he said, “and I think you’ll figure it out.” She wrote: I D 1 0 T