Computer Introduction Computers have played a great role in improving our lives in almost all spheres. They have gained immense importance by increasing the productivity and efficiency of the work done. They are put to use for all sorts of applications ranging from simple activities such as teaching, printing books and playing games to complex calculations. The ease with which computers can store , process and retrieve data have made them inevitable in office and business environments. What is computer? Let's formally define the wonderful machine called Computer. A computer is an electronic device that can perform a variety of operations in accordance with a set of instructions called Program. It Processes the input data given by the programmer/user and provides the desired information as output. Data is a set of basic facts and entities which itself has no meaning, while Information is the data which has some meaning or value. Instruction is a statement given to a computer to perf