You don't have to remember the complete information
You can combine two topics
Example:
Keyword Searching in Subject
   Music and New York
You can do really broad searches that look for words in titles, subjects, and
authors
Example:
Keywords in Words Anywhere
   Music and New York
If you only have the last names of two authors, you can search them
without needing to know their first names
Example:
Author Keywords
    Zinn and Chomsky
You don't have to know the exact subject headings
In our search above, you didn't have to know that some of the Library
of Congress subject headings would be:
Popular music--New York(N.Y.)--History and criticism
Street music and musicians--New York