An Annotated Bibliography is made up of three parts:
A bibliography is a list of works (books, articles, films, etc.) on a particular topic.
An annotation can help the reader determine the value of each work on the topic and the contribution it might make to his own research.
An annotated bibliography includes a paragraph following each citation that summarizes the work.
A descriptive annotation may summarize:
For more explanation of what an annotated bib is, see The Annotated Bibliography by Michael Engle at Cornell University