Applying general systems theory to the evolution of computing gives the computing levels shown in figure 13 where a computing system can be studied as a mechanical system a software system a human system or a social system by engineers computer scientists psychologists and sociologists respectively. Evolution computing makers of fastcad easycad and collectedthought computer aided design and drafting software. The history of computing hardware covers the developments from early simple devices to aid calculation to modern day computers before the 20th century most calculations were done by humans early mechanical tools to help humans with digital calculations like the abacus were called calculating machines called by proprietary names or referred to as calculators. The following brief history of computing is a timeline of how computers evolved from their humble beginnings to the machines of today that surf the internet play games and stream multimedia in
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