Columbia subject headings:
Harvard subject headings:
Health facilities--United States--Communication systems.
Internet access for library users--Law and legislation--United States.
Internet in education--Law and legislation--United States.
Internet in medicine--Law and legislation--United States.
Library information networks--United States.
Schools--United States--Communication systems.
Telecommunication--Rates--Law and legislation--United States.
Princeton subject headings:
Health facilities--United States--Communication systems.
Internet access for library users--Law and legislation--United States.
Internet in education--Law and legislation--United States.
Internet in medicine--Law and legislation--United States.
Library information networks--United States.
Schools--United States--Communication systems.
Telecommunication--Rates--Law and legislation--United States.