In Echallens, Switzerland in 1998, a 105-year-old retired Swiss teacher was ordered to attend elementary school, thanks to a computer that cut a century off his age. The mix-up happened because a list of local residents had only the last two digits of his birth date. So the man, along with sixty-five 5-year-olds in the town, received a letter ordering him to start school. The matter was taken care of, and the computer system was changed.