How does Salesforce.com use cloud computing?

1.         How does Salesforce.com use cloud computing?
2.         What are some of the challenges facing Salesforce as it continues its growth? How well will it be able to meet those challenges?
3.         What kinds of businesses could benefit from switching to Salesforce and why?
4.         What factors would you take into account in deciding whether to use Saleforce.com for your business?

5.         Could a company ran its entire business using Salesforce.com. Force.com, and App Exchange? Explain your answer.