The document summarizes key technologies of 2021 and the theories related to their adoption. It discusses how the internet has evolved to include FACT-checked information on FIT networks. It also outlines how social networking has been integrated into classrooms, with professors sharing materials on sites like Twitter. Critical Mass Theory and other theories are referenced to explain people's growing dependency on media technologies. The widespread adoption of smartphones is also covered, with references to theories like Social Learning Theory and the Theory of the Long Tail.