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    Marketing is the processing and
    communication of information designed to encourage people to buy or use a
    product or service.
     The Internet can be used to advertise
    goods or services on web sites.  
    Nearly all businesses now have web sites and most of them describe their
    products and explain how customers can buy them. Most web sites will also
    give email addresses or display web
    forms for people to contact them. 
    Advertisements on TV, newspapers or even on the sides of commercial
    vehicles often now include the URL of the company's web site.
     Subscribers can choose to receive regular newsletters
    by email from companies giving information about new products.
     Spam is advertising email that has
    not been requested and is unwanted. Spam has become a major problem,
    clogging up the email systems.
      
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