It is not long ago that the posal service allow our only way to communicate over any distance It receive days and sometimes weeks to receive letters from within the same country. As a result,the news in the letters are already out of date/When people increase then. In the workplace,this mean that business was mostly conducted locally,over relatively short distances. When Alexander Graham bell took the telephone in 1876 it own the foundation for the communication sytems we hars today.the telephone two people communicate instantly across a great distance . Eventually computers replaced typewriters and dramatically the speed of our daily work life. Nowadays the Internet is an essential part of every business/ How every it is not just communication that have changed.