Computer.....a revolution

From last many years we are using and lisenting about a very amazing device named as Computer. But what is computer and why this device is so important every where? This complicated question has a simple answer. Just look arround yourself, you will findout many answers of this question. Due to using computer we are comming together. You can send or receive any information from one place to another place, you can keep you update from all news arround the world, you can video chat or talk with your loved ones and its all due to computer. Today robotic computers are cooking food for us and also providing us security everywhere. Computer is working in many dangerous environment even there also where it is impossible to reach for a human. Now we are on Moon and computer is playing a great role in this.
In current time it is very neccessary to know computer. This is my little step to explore my knowledge for those who need it.