Tizen Managed APIs is an underlying core framework layer which consists of 1) a set of core modules such as App framework, Multimedia, Location, Connectivity, Telephony, and 2) open-source frameworks like EFL (Enlightenment Foundation Libraries). The proper use of Tizen Managed APIs allows OEM developers to build their own rich in-house applications with more functionality and flexibility. In this presentation, Jin-Woo Jeong will introduce the basic concept of Tizen Managed APIs as well as structure and components, management policy, roadmap, and useful resources to understand Tizen Managed APIs.