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Mobile phone is one of the wonderful wonders of modern science. It has added a new dimension to our life & to communication system. It is a telephone system that works without any wire. It can move easily & quickly from place to place. Through mobile phone, we can send manages to distance places, play games & sports, know about the time, solve the work of calculation, be aware of different kinds of news & views. At present the popularity of mobile phone is increasing. Many companies are also being set up for selling mobile phone. The price of mobile phone is also decreasing in comparison with the past people are being encouraged to buy a mobile phone. In a very single moment we can communicate with the people living in a very distance place. With its advantages, the mobile phone has some draw backs in disguise. Though the price of it is decreasing, per-minute bill is not decreasing. So everybody cannot posses. Scientist have recently discovered that mobile phone can c

Electronic mail popularly known as e-mail is the communication of textual message via electronic means. In this system  personal computer, a modem & a telephone connection are necessary. It requires an e-mail account number. E-mail is delivered to individual electronic mail boxes based in computers. Messages can be transmitted from one country to another within seconds. It is far cheaper than telephone calls. Privacy is ensured as the e-mail is delivered to an individual’s mail box which can be accessed or opened by the consumption of paper in the office. Nowadays trade & commerce have become greatly depended on this speedy mode of communication. E-mail gives us an opportunity to face the international arena. It establishes almost instantaneous communication to any part of the world & maintains wide information network with remote areas of the globe.