The SharePoint Portal Server user interface is designed around Microsoft Office, Windows, and a Web browser. SharePoint Portal Server features are exposed through extensions to these familiar user interface elements.
SharePoint Portal Server exposes document libraries as Web folders within Windows Explorer using the universal folders and documents interface. Users can easily sort and organize documents based on specific business purpose. This is accomplished through the use of enhanced document folders, which show metadata (document profile) details.
Windows integration features are as follows:
Properties pages — Extended property pages exist within SharePoint Portal Server documents ...