Open Source Intelligence (OSINT) is the material garnered from publicly available resources and assembled into useful information for an intelligence apparatus. This can be governmental, political, commercial, or personal. This introductory field overview encompasses the origins, the foundational readings, the resources, and real world examples of the information in question. There is a real demand for people in the government and commercial space, who are able to acquire, distill, and or assemble OSINT into useful materials for political or commercial gain.