Session state:

Session state refers to information that the Chili!Soft ASP Server stores in the ASP Session object about a sequence of requests that all come from the same browser. HTTP is a stateless protocol – meaning that it provides no way for the ASP Server to keep track of session state. As a result, ASP applications that maintain session-state information (shopping carts, data scrolling, etc) require this type of infrastructure help.

See also:

ASP Session Object in "Chapter 5: Developer’s Reference"

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