สิริวรรณ ใจปทุม

The document discusses the history of calculating machines from Napier's bones in the 16th century to the analytical engine in the 19th century. Key figures mentioned include Napier, Pascal, Leibnitz, Jacquard, Babbage, and Lady Ada who worked on Babbage's analytical engine, one of the first general-purpose computers. The document traces the development of mechanical calculating devices over centuries.