What are the categories of exemptions?

There are nine exemptions listed in the Freedom of Information Act which protect: (1) classified information; (2) internal personnel rules and practices of an agency; (3) records protected from release by other statutes; (4) trade secrets and commercial or financial information that is privileged or confidential; (5) inter- or intra-agency memoranda which would not be available by law to a party in litigation with the agency; (6) personal privacy of individuals; (7) investigatory records compiled for law enforcement purposes; (8) bank examining data used by those supervising financial institutions; and (9) geological or geophysical information on maps concerning wells.