Your Friendly Computer Guy!

I was having trouble with my computer, so I called the computer guy over to my desk. He clicked a couple of buttons and solved the problem. As he was walking away, I called after him, "So, what was wrong?"

And he replied, "It was an ID Ten T Error."

"What's an ID Ten T Error, in case I need to fix it again?"

He grinned. "Haven't you ever heard of an ID Ten T Error?"

"No," I replied.

"Write it down," he said, "and I think you'll figure it out."

I wrote: I D 1 0 T