This document provides an overview of Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) funding programs. It describes who is eligible to receive SBIR/STTR grants, the three phases of funding, and the 11 federal agencies that offer SBIR programs and 6 that offer STTR programs. Key points include that SBIR/STTR grants can fund high-risk research and development, applicants must be US-owned small businesses, and proposals require demonstrating the value of the innovative idea to the funding agency.