What is an computer

Computer is an advanced electronic device that takes raw data as input from the user and processes these data under the control of set of instructions (called program) and gives the result (output) and saves output for the future use. It can process both numerical and non-numerical (arithmetic and logical) calculations. 

The basic components of a modern digital computer are: Input Device, Output Device, Central Processing Unit (CPU), mass storage device and memory. A Typical modern computer uses LSI Chips.  

Four Functions about computer are:  

accepts data Input

processes data 

produces output

Output stores results Storage  

Computer is an electronic device which is capable of receiving information (data) in a particular form and of performing a sequence of operations in accordance with a predetermined but variable set of procedural instructions (program) to produce a result in the form of information or signals.