# What is oooo?

oooo is the first modular omnichain interoperability protocol supporting the Bitcoin ecosystem.

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th></th></tr></thead><tbody><tr><td></td><td><span data-gb-custom-inline data-tag="emoji" data-code="1f52d">🔭</span><a data-mention href="what-is-oooo/oooo-overview">oooo-overview</a></td><td></td></tr><tr><td></td><td>🪜<a data-mention href="what-is-oooo/modular-architecture">modular-architecture</a></td><td></td></tr><tr><td></td><td><span data-gb-custom-inline data-tag="emoji" data-code="1f309">🌉</span><a data-mention href="what-is-oooo/message-delivery-with-oooo">message-delivery-with-oooo</a></td><td></td></tr><tr><td></td><td><span data-gb-custom-inline data-tag="emoji" data-code="1f468-1f4bc">👨‍💼</span><a data-mention href="what-is-oooo/use-cases">use-cases</a></td><td></td></tr></tbody></table>