Answered By: Steven Profit Last Updated: Apr 06, 2015 Views: 8
An index can be a couple of different things in the world of libraries and information.
Concerning books, an index is an alphabetical list of keywords and subjects usually located in the back of a book or the last volume of a multivolume set of books that provides page numbers indicating where those keywords and subjects are discussed inside the book or set.
Concerning articles, an index is a list of articles appearing in certain publications during a certain time period, organized alphabetically by subject and authors' last names. Electronic library databases are also known as online periodical indexes and provide easy keyword access to articles.