In the past, people mainly used letter, and telegraph, while telephone wasn’t widely used. People used to find communication neither easy nor cheap.

Now, the development of technology has brought great changes in people’s way of communication. Besides letter, telegraph, we have various way of communication, such as email, mobile phone, fax, as well as the internet. To people’s joy, the computer and mobile phone which used to be rather expensive are now so cheap that mobile phone has become a must for people. What’s more, the fees of communication has greatly gone down.