Oak Ridge National Laboratory (ORNL) is the largest science and energy national laboratory in the United States Department of Energy. Located in Oak Ridge, Tennessee, it focuses on a wide range of research areas, including materials science, nuclear science, and energy production. Established in 1943, ORNL played a significant role in the Manhattan Project, which developed the first atomic bombs. Today, it continues to contribute to advancements in technology and energy efficiency, collaborating with universities, industry, and other government agencies to address national and global challenges.