Columbia subject headings:
Business records--United States.
Computers--Access control.
Defense information, Classified--United States.
Freedom of information--United States.
Government information--United States.
Public records--Access control--United States.
Trade secrets--United States.
Harvard subject headings:
Business records--United States.
Computer security
Computers--Access control.
Defense information, Classified--United States.
Freedom of information--United States
Government information--United States
Public records--Access control--United States
Trade secrets--United States.
Princeton subject headings:
Business records--United States.
Computers--Access control.
Defense information, Classified--United States.
Freedom of information--United States.
Government information--United States.
Public records--Access control--United States.
Trade secrets--United States.