1. Introduction of Computer
1.6 Concept of Data processing
The computer is an electronic data processing device which is capable of taking input, processing it to generate useful information(output) and store both input as well as the output. The data processing cycle comprises of following 4 distinct stages viz. :-
Data is collected and entered into the computer. This is called input process.
What is entered into the computer is stored in its main memory. This storage is temporary i.e. the contents of the memory are lost when the power is switched off. Another memory, called secondary memory, is used to store the information of the main memory permanently.
The sequence of actions that are performed on the data stored in the main memory, to get results is called processing. Results are stored in the main memory till they are transferred to an output device.
Stored results are taken out of the main memory. This process is known as output process.