Internet filters are software pachages that block users from information available online.
Librarians have a long history of being advocates for freedom of information, but library professionals have also had the luxury of choosing the materials that the library makes available to its patrons. Since the introduction of the Internet into libraries and the explosion of content on the Web, many see filters as a way for libraries to regain stricter control over the selection of materials available in the library. Others in the profession claim that blocking access to any freely available resource online is a form of electronic censorship. Internet Filtering has divided many communities and their library. Several groups and individuals lobby for libraries to install Internet filtering software or enact other restrictions on library computers.