Computer is an electronic device used for various proposes nowadays, except for the calculation what it was meant to be in-the beginning. Computer needs a user to do the job, without a user it cannot process any information or data. So the computer is sometimes is also termed as a dumb machine.
Conventionally, a computer consists of at least one processing element and some form of memory. The processing element carries out arithmetic and logic operations, and a sequencing and control unit that can change the order of operations based on stored information. Peripheral devices allow information to be retrieved from an external source, and the result of operations saved.
A computer's processing unit executes a series of instructions that make it read, manipulate and then store data. Conditional instructions change the sequence of instructions as a function of the current state of the machine or its environment.
In order to interact with such a machine, programmers and engineers developed the concept of a user interface in order to accept input from humans and return results for human consumption.
this made it easy for a user to operate and use the computer more easily and proficiently.
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