11. These shows were later to also influence Charles Babbage in his invention of the difference engine . 12. Nine years later, the Science Museum completed the printer Babbage had designed for the difference engine . 13. For a prototype difference engine , Babbage brought in Joseph Clement to implement the design, in 1823. 14. He is especially known for his work on the computer pioneer Charles Babbage and his Difference Engine . 15. This machine, which he constructed with his son Edvard Scheutz, was based on Charles Babbage's difference engine . 16. Babbage began in 1822 with what he called the difference engine , made to compute values of polynomial functions. 17. "Enginaughts " were originally the trained technicians that created, maintained, programmed, and used " difference engines " ( mechanical computers ). 18. A useful goad to meditation on the Whig interpretation is " The Difference Engine , " by William Gibson and Bruce Sterling. 19. The first one was an " automatic " mechanical calculator, his difference engine , which could automatically compute and print mathematical tables. 20. Indeed, the situation in Russia today has the inexorable technological momentum that is the real subject of " The Difference Engine ."