August 21, 1888. William S. Burroughs patents the first successful adding machine. His first calculating machine (1885), had proved to be commercially impractical, but this ’88 model brought him closer. After much trial and error, he patented a practical model in 1892.
Turns out, our statistician is a big fan, so he went a little wild with the discounts. (Act fast before he comes to his senses.)
Take 15-30% off NEW styles for fall: