An alliance of 57 organizations aiming to protect free expression and access to information.

The ALA provides information on censorship issues and resources advocating for intellectual freedom in libraries and library materials.

An organization affiliated with the American Library Association, aiming to protect and defend the First Amendment to the Constitution and support the right of libraries to collect - and individuals to access - information.

This page has a number of resources organized by the American Civil Liberties Union.

The Federal Communications Commission explains restrictions on various types of programming.