This document provides an overview of IRATI, an open source implementation of RINA for Linux/OS. It discusses the goals of being tightly integrated with the OS, supporting existing applications, and experimentation. The high-level design uses a Linux kernel with user-space daemons. Implementation status provides details on various IPCP components and policies. Experimental activities describe designing RINA networks and interoperating with legacy technologies. Open source initiatives discuss the IRATI GitHub organization and planned contributions from projects like PRISTINE and IRINA.