Name and differentiate the two main categories of storage devices.
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There are two types of storage devices used with computers: a primary storage device, such as RAM, and a secondary storage device, such as a hard drive. Secondary storage can be removable, internal, or external. Why is storage needed in a computer?
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storage units are two type , primary storage and secondary storage
primary storage is known as main memory . it is divide again into two , ram and rom .
ram = ram holds instructions and data and intermedicate results of processing .
rom = the memory from which we can read but cannot write on it
secondary storage = main memory is costly and has limited storage capacity so an alternative is used . it is secondary storage and is also known a auxiliary storage
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