- Manhattan Project - a former United States executive agency that was responsible for developing atomic bombs during World War II
--1 is a kind of executive agency
--1 is a part of executive branch, Executive Office of the President- Manhattan Project - code name for the secret United States project set up in 1942 to develop atomic bombs for use in World War II
--2 is a kind of undertaking, project, task, labor
- Manhattan Project - code name for the secret United States project set up in 1942 to develop atomic bombs for use in World War II