lists of articles and sometimes classifieds or obituaries from magazines, journals, and newspapers about particular subjects, covering specific time periods. Indexes may be in electronic, print or microform formats.
These are tools that help you find periodical (journal, magazine, or newspaper) articles and other sources of information. Indexes can have a specific focus, such as Art Index, or be more general in nature such as Academic Search Elite. Indexes can be in a print format, an electronic format, or both. Now, many indexes are in electronic format and are often referred to as databases.