Jack sat down at the PC. It was one of a line of them in the local library. He took out his keychain, which had small "library card." (This was not like the old sort of library card that he remembered from school days -- this was a smaller thingy suited to a keychain, presumably to make it had to lose.) The card was there along with other convenient little items that have nothing to do with the act of entering or starting a car, including a card of roughly the same size that got him discounts at the local Shop & Grab store. So he entered a longish number into the PC -- thinking it was the library card number. A box in the screen informed him that number was not active. He entered it a second time, being more careful about his typing this time. He got the same error box. He moved over to the next computer at the bank. That seat was also unoccupied. While he was getting himself settled, by habit, he stuck the keychain back in his pocket. When he realized this, he f...