Each lawyer works with different clients and different legal problems.
Many lawyers develop expertise in a particular field of law.
Others, especially the sole practitioner, must be able to handle a variety of problems. However, there are lawyers in large firms who maintain general practices, as well as lawyers in small firms who concentrate on one particular legal issue. Some of the major specializations are corporate, securities, criminal, tax, and family law. Today, however, new fields of law are developing. Examples include such specialties as immigration, international, environmental, entertainment, civil rights litigation and patent law.