Columbia subject headings:
Cell phone systems--Law and legislation--United States.
Confidential communications--United States.
Privacy, Right of--United States.
Telephone--Emergency reporting systems--Law and legislation--United States.
Harvard subject headings:
Cell phone systems--Law and legislation--United States.
Confidential communications--United States.
Privacy, Right of--United States
Telephone--Emergency reporting systems--Law and legislation--United States.
Princeton subject headings:
Cell phone systems--Law and legislation--United States.
Confidential communications--United States.
Privacy, Right of--United States.
Telephone--Emergency reporting systems--Law and legislation--United States.