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Computer memory or Computer data storage; often called storage or memory or refers to computer components, devices and recording media that retain digital data used for computing for some interval of time.
Memory is something that stores, preserves and recalls data when needed. Computer memory is used to store data that needs to be access by the Central Processing Unit (CPU). It is the CPU that performs the laborious tasks, the memory acts as storage for uncompleted tasks and other relevant information needed to accomplish those tasks
The term memory identifies data storage that comes in the form of chips, and the word storage is used for memory that exists on tapes or disks. Moreover, the term memory is usually used as a shorthand for physical memory, which refers to the actual chips capable of holding data. Some computers also use virtual memory, which expands physical memory onto a hard disk.
Every computer comes with a certain amount of physical memory, usually referred to as main memory or RAM. You can think of main memory as an array of boxes, each of which can hold a single byte of information. A computer that has 1 megabyte of memory, therefore, can hold about 1 million bytes (or characters) of information.
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