My clothes washing machine broke down last week, and we needed someone to come out and take a look. The Sears guy pulled up in his van, which had a dish antenna on top. He grabbed his Tablet PC out of the passenger side of his van, and came inside.
After coming inside, I showed him to the machine, and he punched the model number into his computer. He then looked at the washer, diagnosed the issue, punched the parts he needed into the computer, whipped out a printer, and then handed me a work order.
Took about 5 minutes.