Applied DNA Sciences, Inc. engages in developing and marketing technologies to produce and detect deoxyribonucleic acid. It operates through the following segments: Therapeutic DNA Production, MDx Testing Services, and DNA Tagging and Security Products and Services. The Therapeutic DNA Production segment consists of the manufacture of DNA for use in nucleic acid-based therapeutics. The MDx Testing Services segment is involved in performing and developing clinical molecular diagnostic tests and clinical laboratory testing services. The DNA Tagging and Security Products and Services segment includes manufacture and detection of DNA for industrial supply chain security services. The company was founded in 1983 and is headquartered in Stony Brook, NY.