Computer science development of sophisticated computing equipment. Wilhelm Schickard designed and constructed the first working mechanical calculator in 1623. In 1673, Gottfried Leibniz demonstrated a digital mechanical calculator, called the Stepped Reckoner. He may be considered the first computer scientist and information theorist, for, among other reasons, documenting the binary number system. In 1820, Thomas de Colmar launched the mechanical calculator industry when he released his simplified arithmometer, which was the first calculating machine strong enough and reliable enough to be used daily in an office environment. Charles Babbage started the design of the first "automatic mechanical calculator", his Difference Engine, in
Digital Computer Association the top circumference of the reel was the phrase "Since 1952" and around the bottom "FASTER THAN A SPEEDING CORK". The DCA continued in this fashion through 1993. In 1994, it was disbanded. This was influenced by the occurrence of the 1994 Northridge earthquake and the subsequent confusion and movement of several people away from the Los Angeles area. Digital Computer Association The Digital Computer Association (DCA) was established in November 1952 in Santa Monica, California. The organization held monthly 2–3 hour technical dinner meetings at local restaurants attended by early computer engineers and computer programmers. The founder was R.