Most promotions are self-contained, organized around one or more championships and do not acknowledge or recognize the legitimacy of other promotions' titles unless they share a working agreement. Governing bodies, such as the CyberFight, United Wrestling Network, WWNLive, Allied Independent Wrestling Federations, Pro Wrestling International and, previously, the National Wrestling Alliance, act as an umbrella organization which governs titles that are shared among multiple promotions. During the 1950s, the National Wrestling Alliance oversaw many wrestling territories such as Mid-Atlantic Wrestling and NWA San Francisco, in a business model known as the "territory system".[3]