The Watch Tower Bible and Tract Society of Pennsylvania is a nonprofit corporation formed in 1884 under the laws of the Commonwealth of Pennsylvania, U.S.A. It is used by Jehovah’s Witnesses to support their worldwide work, which includes publishing Bibles and Bible-based literature.
According to its charter, the corporation’s purposes are “religious, educational, and charitable,” in particular, to “preach and teach the gospel of God’s Kingdom under Christ Jesus.” Membership in the corporation is by invitation only and is not based on how much a person has donated. The corporation members and directors assist the Governing Body of Jehovah’s Witnesses.