"The Linux Foundation protects the public and Linux users from unauthorized and confusing uses of the trademark and authorizes proper uses of the mark through an accessible sublicensing program. The Linux Foundation offers a free, perpetual, world-wide sublicense to approved sublicense applicants. In return, the sublicensee holders must agree not to challenge Linus Torvalds' ownership of the Linux mark in any jurisdiction, and to provide proper attribution of ownership on their goods, services and elsewhere. The Linux Sublicense Agreement is available for review."