People and organizations share some key information concepts that need to be tracked. Explain

• Relationships. Persons may have relationships with other persons or organizations. A person may have a relationship as employee with one department and then switch to another; a customer may have a relationship as a client with one sales representative and then switch to a new sales territory or sales representative.
  
  
• Addresses. People and organizations both have addresses;
  
  
• Contact method. People and organizations are both contacted via email; web site URL’s, phone numbers, fax numbers; and
  
  
• Contact information. Most companies have a need to track communications such as email, customer contact, etc.