Starting Points Defined
There are different types of starting points on the World Wide Web: primary
and secondary. The primary starting point is the broadest level and it is
the point at which a reader starts a Web session.
The primary starting point is most often the browser's home document (the
page loaded when the browser is launched, usually definable by the user.
Software is available, however, that makes it possible
to bypass the home document and go directly to a specific document). With
a primary starting point, getting to a particular work involves bookmarks,
links from other pages, or through search engines. The beginning of a Web
session is the best representation of the starting point because it is always
the first node a reader sees, but other
types have can also function as a starting points.
Starting
Points 
Secondary
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