Computers

I was chatting to the lady in the newsagents the other day. She was complaining about a phone call she'd got one Thursday morning, right in the middle of her busiest time. She told the young man that she didn't have time to talk because she had customers in the shop.
"All right - I'll email you," he said.
"We don't have a computer," she said.
"But - you must have! You're a business!" he spluttered. He really couldn't imagine how they could manage without one - and the answer is, very well, actually!