![]() The former controls the flow of data between the CPU and memory, while the latter performs arithmetic and logical operations on data. This distinction was extended in the Von Neumann architecture, where the CPU consists of two main parts: The control unit and the arithmetic logic unit (ALU). Generally, the fast technologies are referred to as "memory", while slower persistent technologies are referred to as "storage".Įven the first computer designs, Charles Babbage's Analytical Engine and Percy Ludgate's Analytical Machine, clearly distinguished between processing and memory (Babbage stored numbers as rotations of gears, while Ludgate stored numbers as displacements of rods in shuttles). In practice, almost all computers use a storage hierarchy, : 468–473 which puts fast but expensive and small storage options close to the CPU and slower but less expensive and larger options further away. The central processing unit (CPU) of a computer is what manipulates data by performing computations. ![]() ![]() ![]() It is a core function and fundamental component of computers. Read/Write DVD drive with cradle for media extendedĬomputer data storage is a technology consisting of computer components and recording media that are used to retain digital data.
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