Refers to any unclassified information and includes anything freely available on the web.  OSINT is the opposite of closed-source intelligence or classified information.  Common OSINT sources include social networks, forums, business websites, blogs, videos, and news sources. OSINT is not related to open-source software or public intelligence.

Simply stated, OSINT is information that is open to the public. It is not private information stored on someone’s private servers. When you use a search engine you are most likely accessing OSINT. When you access public forums, social media posts and profiles, and government records ( i.e. publicly available city, state, county records), you are accessing OSINT.