The Annotated Bibliography versus* the List of References or End Notes.
You are expected to prepare an annotated bibliography.
The Annotated Bibliography is a full bibliographic listing of a set of documents (books, articles, websites, etc) that were helpful in your general research. You further annotate each bibliographic listing with a sentence or few, explaining how you found it helpful (or maybe how you did NOT!). It is intended as a general guide for a person interested in further pursuing the topic of your comps. It is ordinarily in alphabetical order of the first author’s last name. It is the last section of your comps, and is generally* separate from your List of References or Endnotes.
The List of References or Endnotes is a full bibliographic listing of a set of documents (books, articles, websites, etc) that were specifically referred to in the body of the paper. If AIP Style is used, it is numbered, with the corresponding numbers appearing in order in the text at the point of reference. Other styles (e.g., astronomers’) will order it alphabetically and refer to it in the body by author(s) and year.
Note that a given bibliographic listing may appear in one or the other or both the List of References and the Annotated Bibliography. (A Venn diagram would probably show the List of References and the Annotated Bibliography as a pair of partially overlapping domains.).
*Some Comps advisors prefer that the Annotated Bibliography and the (List of References or End Notes) be a single merged item. Consult your advisor. Examples of both types can be found in the volumes of previous years’ comps, located on the bookshelves outside the departmental office.