Since computer became personal in the early 1970s computers have invaded in every territory of our professional and personal life. Thanks to the advancement in the field of computer science and widespread availability of PC, we can not even think of a world without computers. Be it simple word processing or spreadsheet applications or the high end real time computing, computers are everywhere. Especially after the World Wide Web and the internet revolution computers are indispensable these days.

Since the inceptions computers have come a long way. Continuous research and development in the field of computer science made it possible to use computers in almost every day to day work. The capacity of the computers in terms of computation ability, efficiency, computation time, storage has enhanced manifolds. Moreover, the availability of the computers and the affordable price of the computers have also been an instrumental factor for the phenomenal rise in the use of computers. Today we can prepare word documents, calculate accounts, maintain database, and make presentations with the personal computers. Computers are being widely used in the field of research and development, space programs and for maintaining satellites and monitoring weather and so many high end activities. Computers are widely used in the field of medical science. Digital photography and multimedia and audio visual capabilities of the computers have changed the way we used to crate and edit images, videos and sound.

Though computers are being used in every possible ways these days internet is possibly the most revolutionary thing that have happened since the invention of computers. The World Wide Web or the internet has completely changed the world. The computers and the internet has the made the greatest impact in our life in the past century. It has practically changed everything from the way we thought and worked. Now the world has become a global village as it is rightly said. Now we have any information we need at our fingertips. We can do virtually anything with just a few clicks of the mouse – be it banking, filling up online forms, shopping, booking for a vacation or sending gifts – everything you need can be found at the World Wide Web. This is why major number of the PC users these days uses the email application or the web browsing with their Personal computers.

With the launch of the portable PC in 1975 the world of computing has gone through a major change. This was the early stage of laptop computers or laptop as it is most commonly known. Laptops are also personal computers that come in a portable size and can be carried away easily. It is the mobility of the laptops that have made it so popular among the PC users. It can be easily carried and used anywhere you need it. The battery powered laptops lets you use your PC on the move. Though earlier laptops had some limitations in terms of computation capacity, storage and speed, laptops these days are at par with the desktop computers. With the spread of Wi-Fi you can now even get connected to the Web without wires and this has surely made laptops a truly portable and mobile computer.