History of Computer

Topics: Computer, History of computing hardware, Konrad Zuse Pages: 25 (8860 words) Published: June 21, 2013
History of computing hardware

Computing hardware is a platform for information processing. History of computing|
* Hardware before 1960 * Hardware 1960s to present * Hardware in Soviet Bloc countries| Computer science|
* Artificial intelligence  * Compiler construction * Computer science  * Operating systems * Programming languages  * Software engineering| Modern concepts|
* Graphical user interface  * Internet * Personal computers  * Laptops  * Video games * World Wide Web| Timeline of computing|
* 2400 BC–1949  * 1950–1979  * 1980–1989 * 1990–1999  * 2000–2009  * 2010–2019 * more timelines ...| *  Category|
* v  * t  * e|
Computing hardware evolved from machines that needed separate manual action to perform each arithmetic operation, to punched card machines, and then to stored-program computers. The history of stored-program computers relates first to computer architecture, that is, the organization of the units to perform input and output, to store data and to operate as an integrated mechanism. Before the development of the general-purpose computer, most calculations were done by humans. Mechanical tools to help humans with digital calculations were then called "calculating machines", by proprietary names, or even as they are now, calculators. It was those humans who used the machines who were then called computers. Aside from written numerals, the first aids to computation were purely mechanical devices which required the operator to set up the initial values of an elementary arithmetic operation, then manipulate the device to obtain the result. A sophisticated (and comparatively recent) example is the slide rule in which numbers are represented as lengths on a logarithmic scale and computation is performed by setting a cursor and aligning sliding scales, thus adding those lengths. Numbers could be represented in a continuous "analog" form, for instance a voltage or some other physical property was set to be proportional to the number. Analog computers, like those designed and built by Vannevar Bush before World War II were of this type. Numbers could be represented in the form of digits, automatically manipulated by a mechanical mechanism. Although this last approach required more complex mechanisms in many cases, it made for greater precision of results. In the United States, the development of the computer was underpinned by massive government investment in the technology for military applications during WWII and then the Cold War. The latter superpower confrontation made it possible for local manufacturers to transform their machines into commercially viable products.[1] It was the same story in Europe, where adoption of computers began largely through proactive steps taken by national governments to stimulate development and deployment of the technology.[2] The invention of electronic amplifiers made calculating machines much faster than their mechanical or electromechanical predecessors. Vacuum tube (thermionic valve) amplifiers gave way to solid state transistors, and then rapidly to integrated circuits which continue to improve, placing millions of electrical switches (typically transistors) on a single elaborately manufactured piece of semi-conductor the size of a fingernail. By defeating thetyranny of numbers, integrated circuits made high-speed and low-cost digital computers a widespread commodity. There is an ongoing effort to make computer hardware faster, cheaper, and capable of storing more data. Computing hardware has become a platform for uses other than mere computation, such as process automation, electronic communications, equipment control, entertainment, education, etc. Each field in turn has imposed its own requirements on the hardware, which has evolved in response to those requirements, such as the role of the touch screen to create a more...
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