Columbia subject headings:
Copyright and electronic data processing--United States.
Copyright--Databases--United States.
Electronic information resources--Law and legislation--United States.
Information superhighway--Law and legislation--United States.
Intellectual property--United States.
Science--Databases--Access control--United States.
Science--Databases.
Technology--Databases.
Harvard subject headings:
Copyright--Databases--United States.
Science--Databases--Access control--United States.
Princeton subject headings: