Intro to the ASP Object Model

Alright we have now written a very simple ASP
  page, but lets take some time and explore some of the built in features of
  ASP. The first thing that we should take a look at are the five intrinsic
  objects that are part of the ASP Scripting Context (an important note is
  that there is a sixth object which will be covered later). The diagram
  below shows the five main objects. They are the Request, Response,
  Application, Session, and Server.

  

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Each of these objects has there its own methods
  and properties that the following sections are going to cover. To give a
  rough outline.
  

  
• Request: This object exposes the
     properties of the HTTP request. A request is what is sent to the
     server when the browser asks for a particular action. For instance
     typing http://www.4aspdev.com/contact.asp
     is a request to the 4aspdev server for the contact.asp page. There is
     a lot more to it than that, but for now let's leave it at that.
  
    
    
• Response: The response object exposes
     the properties of the server response. The response is what the server
     sends to the browser after a request is made. The response object
     allows you to:
    
  
    
  • Control what data is sent in the header of
        the HTTP response (don't worry if you don't know what a header is
        I will get to that later)
      
  • Control what data is sent to the client in
        the <:body> of the HTTP response
      
  • Control when and how the data is sent
  
    
  
    
  
    
• Application: This object allow you to
     manipulate the properties of the application. In ASP an application is
     all the files in a virtual directory and its subdirectories.
     Application scope covers all users of the web site so if you set an
     application level variable or setting it will effect everyone that
     uses the site.
  
    
    
• Session: This object allows you to
     control the properties on an individual user session. A session starts
     when a user first comes to you site and ends either when they leave,
     close their browser, or at a set timeout. Any variables or settings
     that are made using the session object are on an individual basis.
  
    
    
• Server: This object effects the Server
     itself. This object allows you to control certain aspects of the
     server such as script timeout. Which is the time that a script is
     allowed to process.