Areas of Law means specific and confined materials on only one law area.  The best location to browse different areas of law is the Legal Information Institute at Cornell.  The Legal Information Institute provides an alphabetical index of many areas and a brief description of each area with relevant links.

Sample areas of law include:

Bankruptcy
Contracts
Personal Injury
Administrative Law
Torts
Health Care

Other Areas of Law Resources on the Internet:

NOLO
All Law.com
FindLaw.com
HG.org