Black project is an informal term used to describe a highlyclassified, top-secret military or defense project that is not publicly acknowledged bygovernment, military personnel, or contractors.

In the United States, the formal term for a black project is anunacknowledgedspecial access program (SAP). Black projects receive their funding from theblack budget.

The US depends on private defense contractors to develop and build military equipment. The two most notable examples areLockheed Martin andNorthrop Grumman. The R&D department of Lockheed Martin is commonly referred to asSkunk Works; it is responsible for a number of aircraft designs, highly classified R&D programs, and exotic aircraft platforms.

Two well known sites for testing of black projects arethe Nevada Test site andArea 51.

Below are examples of previously unacknowledged black projects categorized per country.

• Nuclear weapons program
• Xian H-20 subsonic stealth bomber aircraft

• Nuclear Weapons program

• Nuclear weapons program

• Kh-47M2 Kinzhal air-launched "Iskander" ballistic missile

• Project Coast chemical and biological weapons program
• Atlas Carver multirole fighter aircraft

• Nuclear weapons program
• Sputnik 1 artificial Earth satellite
• Typhoon submarine
• Vostok programme human spaceflight project

• Nuclear weapons program (was never completed)

• Switzerland and weapons of mass destruction

• Ultra WW2 Decryption Programme
• Tube Alloys WW2 Nuclear Weapons Programme
• High Explosive Research Post-war Nuclear Weapons programme
• Zircon Signals Intelligence Satellite

• Boeing Bird of Prey stealth technology demonstrator
• Hughes Mining Barge CIA project authorized 1974 to raise sunken Soviet submarineK-129
• KH-11 Kennen reconnaissance satellite
• Lockheed CL-400 Suntan high-altitude, high-speed reconnaissance prototype
• Lockheed Have Blue stealth technology demonstrator
• Lockheed F-117 Nighthawk stealth ground-attack aircraft
• Lockheed Martin Polecat unmanned aerial vehicle
• Lockheed Martin RQ-170 Sentinel
• Lockheed SR-71 Blackbird Mach 3.3 very high-altitude reconnaissance aircraft
• Lockheed Martin SR-72
• Lockheed U-2 very high-altitude reconnaissance aircraft
• Manhattan Project Nuclear weapons program
• Northrop Grumman B-2 Spirit stealth bomber
• Northrop Grumman B-21 Raider stealth bomber
• Northrop Grumman RQ-180 stealth unmanned aerial vehicle (UAV) surveillance aircraft
• Northrop Tacit Blue
• RQ-3 Dark Star high altitude reconnaissance UAV
• Sikorsky UH-60 Black Hawk stealth helicopter
• Lockheed Sea Shadow (IX-529) experimental stealth US Navy ship

• Black operation
• Compartmentalization (information security)
• Open secret
• List of established military terms
• List of government and military acronyms
• Glossary of military abbreviations
• List of U.S. security clearance terms

• United States defense procurement
• Secret government programs

• Articles with short description
• Short description is different from Wikidata