This occurs for two reasons:
- Programs are not necessarily released from memory when you switch away from them by clicking a hyperlink.
-and-
- Clicking a hyperlink may result in loading a new instance
(or process) of the program to which you are linking.
For example, if you click a series of hyperlinks that take you from
Microsoft Internet Explorer to Microsoft Excel, then to Microsoft Word,
then to Microsoft PowerPoint, and then back to Internet Explorer,
you may find that all of the programs are still loaded into memory and in
some cases, more than one instance of a program is in memory.