Columbia subject headings:
Criminal records--United States--Electronic discussion groups.
Information storage and retrieval systems--Criminal investigation--United States.
Sex offenders--United States--Information services.
Harvard subject headings:
Criminal records--United States--Electronic discussion groups.
Information storage and retrieval systems--Criminal investigation--United States.
Sex offenders--United States--Information services.
Princeton subject headings:
Criminal records--United States--Electronic discussion groups.
Information storage and retrieval systems--Criminal investigation--United States.
Sex offenders--United States--Information services.