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Several measur es of perf ormance have been used in the eval uation of compute r systems. The most common ones are: million instru ctions per secon d (MIPS ), million operations per second (MOPS), million floating-point operations per second (MFLOPS or megaflops), billion floating-point operations per second (GFLOPS or gigaflops), and million logical inferences [...]
Commercial computer system development has followed development of hardware technology and is usually divided into four generations:
1. First generation (1945–1955)—vacuum tube technology.
2. Second generation (1955–1965)—transistor technology.
3. Third generation (1965–1980)—integrated circuit (IC) technology.
4. Fourth generation (1980–??)—Very Large Scale Integrated (VLSI) circuit technology.
We will not elaborate on the architectural details of the various machines developed during the [...]
Man has always been in search of mechanical aids for computation. The development of the abacus around 3000 BC introduced the positional notation of number systems. In seventeenth-century France, Pascal and Leibnitz developed mechanical calculators that were later developed into desk calculators. In 1801, Jacquard used punched cards to instruct his looms in weaving various [...]
The hardware components of a computer system are electronic devices in which the basic unit of information is either a 0 or a 1, corresponding to two states of an electronic signal. For instance, in one of the popular hardware technologies a 0 is represented by 0V while a 1 is represented by 5 V. [...]