Look at several dynamic websites (i.e. Amazon.com, monster.com, their curriculum in iCampus) and…

Look at several dynamic websites (i.e. Amazon.com, monster.com, their curriculum in iCampus) and determine what kind of programming environment is being employed bythese companies or individuals. Please consider the following questions:
Why would a company select one technology over another?
How much does cost play into a decision when selecting the programming environment?
Do you see any particular benefits of one environment over the other?
Do those benefits change the end-user experience?