Web Content Filtering
Content-control software, also known as censorware or web filtering software is a term for software designed and optimized for controlling what content is permitted to a reader, especially when it is used to restrict material delivered over the Web. Content-control software determines what content will be available on a particular machine or network; the motive is often to prevent persons from viewing content which the computer's owner(s) or other authorities may consider objectionable; when imposed without the consent of the user, content control can constitute censorship. Common use cases of such software, include parents who wish to limit what sites their children may view from home computers, schools performing the same function with regard to computers found at school, and employers restricting what content may be viewed by employees while on the job.