The study of using the tools of communication within the year 2540 to the 2557
communication tool is doing is developing what
.Communication tool is to use to communicate with people you want to communicate with ได้อย่างง่าย and quickly, such as cell phone
.Before the coming of age of the mobile phone and PC. In one era (about a year 2540). We used to communicate through the machine, pager, or also known as packet link in the official said a pager.The black clothing (first generation). To tremble every incoming message unit. When pressed, it will find text displayed on the screen for long, there are a variety of brands, at first. The pager is popular in the business community and government.The outer part time job is used to contact the private business. And in that era pager has played a great role in the radio. Boys and girls, mainly at the time used in weaving, pager, relationship. Instead of writing letters seems to delay the time obsolete
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