Evolution of Computer Technology

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Several centuries have been taken toward the development of inventions made by different people into modern forms. Single inventors rarely bring out modern invention. What we have now as electronic devices (the computers) are inventions of several scientists, mathematicians and engineers from different centuries. For the purpose of this mini research key terms like evolution, technology and computer shall be considered, not forgetting to take a careful look at the evolution of these inventions from different centuries/years to our present generation starting from the earliest known device. The characteristics of these devices from generation to generation and their classification according to sizes, functions and uses shall
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RAM also stores the result of a processed data, waiting to be transferred to output device or secondary storage device. It is a temporary memory and the content of RAM is erased when a computer is turned off and data stored in it can instantly be accessed.

The storage of RAM is expressed in megabytes and its capacity or size limited. An area of RAM set aside for storage of most frequently accessed information is the CACHE memory. It is a temporary high speed data holding area between the memory and the central processing unit. RAM has four parts: the conventional memory which consist of the first 640KB of RAM, used by operating system and device drivers; Upper Memory Bound (UMB) located between 640KB and 1MB of RAM, used by device drivers: extended memory (XMS) which include direct access memory above 1MB; and Expended memory: a special part of ram that is up to 32MB and exists outside the conventional memory.

Read only memory (ROM) is preloaded with data and software that never changes, so the central processing unit (CPU) can only read it.ROM is typically used to store the computer’s initial start up instructions. It retains its data indefinitely. In a personal computer (PC), ROM contains a specialized program called the BIOS that orchestrates loading the computer’s operating system from the hard disc drive into RAM whenever the computer is turn on
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