History of Computers - Pascaline

In 1642, Blaise Pascal invented the Pascaline, a machine that, although simple, would ultimately lead to some of the most complex and sophisticated computers of our time. That is, with significant help from other inventors and mathematicians along the way. However, the Pascaline set the stage by successfully performing additions and subtractions more quickly and productively than its operator using a system that is still used in modern calculators and computers.

Links

http://www.maxmon.com/1640ad.htm

http://www.thocp.net/hardware/pascaline.htm