John Cohen is a common name and can refer to various individuals across different fields. One notable John Cohen is an American photographer and filmmaker known for his work in the 1960s, capturing the essence of American culture and music. His photographs often depict iconic musicians and social movements of that era. Another prominent John Cohen is a professor and researcher in the field of computer science, focusing on artificial intelligence and machine learning. His contributions to the academic community include numerous publications and advancements in technology, influencing both education and industry practices.