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Memory is a computer systems primary workspace It works in one behind the other with the CPU or microprocessor to store data programs and processed information that can be made immediately and directly accessible to the CPU or to other system devices Memory is central to a computers operation because it forms the critical link between software and the CPU Computer memory also determines the size and number of programs that can be run simultaneously and helps to optimize the capabilities of powerful microprocessors RAM Random Access Memory Internally computer memory is arranged as a matrix of memory cells laid out in rows and columns like squares on a checkerboard Each memory cell is used to store a bit of data which can be instantaneously retrieved by indicating the row and column location or address of the data Because these bits of data can be individually accessed retrieved and modified at random the type of main memory used in computers is called random access memory RAM is a volatile form of memory which means that it must have power in order to retain data When the power is turned off data in RAM is lost Contrast this to other storage media such as disks tapes and CDs that retain data even without power There are many different kinds of RAM each with its own features and benefits For instance Extended Data Out EDO allows back-to-back memory accesses to occur much faster because EDO is easy to implement it has gained wide acceptance in a very short span of time A computer system must be designed to support EDO in order to make use of the extra efficiency it offers EDO memory in a system that doesnt support it will still work but there will be no performance increase Dynamic RAM DRAM is the most common type of computer memory A bank of memory modules using DRAM chips usually forms the core of a
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