StopDog is believed to be the largest filtered search engine in America and was created in the late 1990's to spider websites for appropriate search material.

StopDog is used by millions around the world and logs as many as 350 queries per second.

StopDog uses"DogBot" to crawl websites in search of inappropriate material.

StopDog was designed to be a Kid Safe, Family Safe, Filtered Search Engine which grew popular among all users.

Stopdog, which incorporates WikiPedia, DMOZ, major libraries, and it's own private database was once a directory second in size only to ODP and Yahoo.