The Johns Hopkins University Applied Physics Laboratory

About Us

Johns Hopkins University Applied Physics Laboratory (APL) is a not-for-profit research center affiliated with Johns Hopkins University, established in 1942. Headquartered in Laurel, Maryland, APL employs over 8,800 people and focuses on advanced research and engineering primarily for U.S. government sponsors. The lab addresses national security, space exploration, and various complex challenges. APL has a rich history, beginning with its development of the proximity fuze during World War II. It has since expanded its expertise into areas such as air and missile defense, undersea warfare, space systems, and biomedical innovations. Notable projects include the MESSENGER spacecraft, the Transit satellite navigation system, and the development of the disposable syringe. APL is recognized for its contributions to defense and civilian applications, completing over 600 projects that emphasize mission-critical technologies.

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