Computer development is one of the greatest scientific achievements of the 20th century. This is one of the wonderful and probably the most powerful tools ever developed. The computer has brought many changes in our daily life. Nowadays, the computer is an essential device for most of the organizations, offices as well individual for different purposes. We shall totally depend on the computer near the future.
The computer is an electronic device that can perform a variety of tasks according to the set of instructions given to it. It accepts raw data from the user and produces meaningful results by means of data processing. The word computer is derived from the Latin word “computare” which means to compute or calculate. But the use and purpose of a computer are not only limited to computation. It can be used in different fields for various purposes, such as withdrawing money from banks through ATM (Automated Teller Machine), making online shopping through credit cards, accessing library books through the Internet, Preparing salary sheets using application programs, making communication through the Internet of networking, etc. Therefore a computer can be defined as:
A computer is an electronic machine that accepts raw data from the user, processes data according to the predefined set of instructions, gives and stores the result as information.
A computer is an electronic device that generates information by means of data processing. It can also store the information for future purposes and make them accessible when required.