Method	Location	Comments
	Cookies	Client	Requires browser support. Not easy to implement.
	QueryString (ASP Request object method)	Between server and client	Limited data size (around 2K). Suitable for a few data entries.
	URLData (WebClass method)	Between server and client	Same as QueryString
	Text files (ASP TextStream object)	Server	Consumes server disk space. Slow due to read-and-write to hard drive.
	Database	Server	Consumes server resources such as memory and data connections.
	COM Component (class)	Server	Easy to implement. Consumes server memory.

Table 1 Use Methods That Give State to Data. You can use several methods to pass data from one method call to the other. Not all methods are suitable for a shopping cart; COM is the recommended method.