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  Major Divisions of CPU

Introduction to Major Division of CPU

A computer as displayed in diagram below carry out mainly five main operations or functions irrespective of their size and make. These are

1) It accepts data or instructions through way of input,

2) It stores data,

3) It can process data as needed by the user,

4) It provides results in the form of output, and

5) It manages all operations inside a computer.

1. INPUT:

Input is the process of entering programs and data in the computer system. You should be familiar with that computer is an electronic machine such as any other machine that takes as inputs raw data and carry on some processing providing out processed data. So, the input unit acquires data from us to the computer in an organized way for processing.

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Figure: Basic computer Operations

2. STORAGE:

Storage is the process of saving data and instructions permanently. Data has to be delivered into the system previous to the actual processing begins. It is since the processing speed of CPU (Central Processing Unit) is very fast that the data has to be given to CPU with similar speed. So the data is first stored in the storage unit for faster processing and access. This computer system's primary storage is intended to do the above functionality. It gives space for storing instructions and data.

The storage unit carry out the following main functions:

  • Each data and instructions are stored here before and after processing.
  • Intermediate results of processing are as well stored here.

3. PROCESSING:

The duty of performing operations such as arithmetic and logical operations is known as processing. The Central Processing Unit (CPU) gets data and instructions from the storage unit and performs all types of calculations relies on the instructions provided and the type of data given. It is after that delivered again to the storage unit.

4. OUTPUT:

Output is the process of generating results from the data for getting helpful information. Likewise the output generated through the computer after processing must also be kept wherever inside the computer before being provided to you in human readable form. Again the output is as well stored inside the computer for additional processing.

5. CONTROL:

The way how instructions are executed and the above operations are carried out. Controlling of all operations such as input, processing and output are carried out through control unit. It is careful of gradually processing of all operations in the computer.

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