People have to work to earn a living. Some deliver the mail. Others grow crops. Still others work for an insurance company or run a small business. Things like shoes, refrigerators and automobiles are all made by people doing different kinds of jobs. These types of jobs are more or less traditional.
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Living at the beginning of the 21st century, we are witnessing a new way of working. More and more business is handled in accordance with more up-to-date technological standards. A typical example is the computer online system.