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Memory storage is a device in which computer store the data. It is one of the fundamental components of all modern computers, and coupled with a central processing unit (CPU),
The fundamental components of a general-purpose computer are arithmetic and logic unit, control circuitry, storage space, and input/output devices. If storage was removed, the device we had would be a simple digital signal processing device (e.g. calculator, media player) instead of a computer. The ability to store instructions that form a computer program, and the information that the instructions manipulate is what makes stored program architecture computers versatile.
There are two type of memory
• Primary Memory
• Secondary memory
Primary memory is direct connected to CPU.means to say fetch instruction direct from the CPU.
Primary memory is also three types
• Processor register
• Cache memory
• Main memory

While secondary memory use when input/output channel is required and it is used for long term storage.

There is some other device to use for storing the data as:

• Magnetic storage

• Semicoundter storage

• disk storage


These devices are also used for storing the data. A Digital computer represents information using the binary numeral system. Text, numbers, pictures, audio, and nearly any other form of information can be converted into a string of bits, or binary digits, each of which has a value of 1 or 0. The most common unit of storage is the byte, equal to 8 bits.

Various forms of storage, based on various natural phenomena, have been invented. So far, no practical universal storage medium exists, and all forms of storage have some drawbacks. Therefore a computer system usually contains several kinds of storage, each with an individual purpose.

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