In English, compute means to calculate something. To calculate means to do some mathematical operations. About 30/40 years ago, calculator was introduced as a calculating device. Calculator computers the numbers or it does mathematical operations. This is also a digital operating device. But, computers originated with a huge size and extremely high processing capabilities. Later on, computer has become very powerful devices to aid the development of data processing and research. Their sizes reduced and processing capacities and speed increased tremendously. Therefore, it has become an essential media for communication; computer also has a very role to play to bringing the world together. Computer is used in almost every field in development.
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