Westlaw is one of three comprehensive legal research databases that provide access to federal and state statutes, case opinions and regulations as well as commentary on the law in the form of articles and treatises.
Lexis is another of the three major online legal databases. Lexis-Nexis contains thousands of publications which provide extensive sources of information in the areas of law, news, business, and other subjects.
Bloomberg Law is the newest of the three online legal databases. Like Westlaw and Lexis it is a comprehensive resource for primary and secondary law. In addition, Bloomberg Lawhas several practitioner tools including access to federal dockets, BNA Law Reports, Manuals, Portifolios, checklists, transactional documents, and more.