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SIGSALY
SIGSALY, also known as Ciphony I, was the first secure voice encryption system, built by Bell Labs and used by the U.S. Army from 1943.
Sigstore
Sigstore is an open source project for software supply chain security, announced by the Linux Foundation in 2021, that lets developers sign and verify software artifacts such as container images using ephemeral signing keys.
SIGTRAN
SIGTRAN (Signalling Transport) is an IETF protocol suite, defined in RFC 2719 in 1999, for carrying telephony signaling protocols such as SS7 over IP networks.
Sigurd A. Sjoberg
Sigurd A. Sjoberg was an American aeronautical engineer who led NASA's flight operations through Apollo, helped return Apollo 13 safely, and was deputy director of the Johnson Space Center from 1972 to 1979.
Sigvard Bernadotte
Sigvard Bernadotte, born in 1907 as Prince Sigvard of Sweden, was a Swedish count and designer who lost his royal title through marriage and became a pioneer of Scandinavian industrial design.
Sihanoukville Autonomous Port
Sihanoukville Autonomous Port (Khmer: កំពង់ផែស្វយ័តក្រុងព្រះសីហនុ), commonly abbreviated PAS, is Cambodia's only deep-sea commercial port, opened in 1960 and handling roughly three-quarters of national seaborne trade.
Sihanoukville CIIDG power station 2
Sihanoukville CIIDG power station 2 (西哈努克港2×350MW燃煤电站项目) is a 700 MW coal-fired power plant in Preah Sihanouk Province, Cambodia, jointly owned by China Huadian and CIIDG; fully operational since December 2022, it is Cambodia's largest power station.
Sihil Oil and Gas Field
Sihil is an offshore oil and gas field in the Bay of Campeche, Mexico, part of Pemex's Cantarell Project. Discovered in 2002, it lies beneath the original Cantarell reservoirs.
Sihong Wang
Sihong Wang is a materials scientist and associate professor at the University of Chicago and Argonne National Laboratory who develops stretchable polymer semiconductors for wearable and implantable bioelectronics.
Sihwa Lake Tidal Power Station
The Sihwa Lake Tidal Power Station (시화호조력발전소) is a 254 MW tidal barrage power plant on South Korea's west coast, the largest tidal power plant in operation.
Sikka Thermal Power Station
Sikka Thermal Power Station (Sikka TPS) is a 500 MW coal-fired power station near Jamnagar, Gujarat, India, owned by Gujarat State Electricity Corporation Limited. Its two 250 MW units were commissioned in 2015.
Sikorsky Aircraft
Sikorsky Aircraft, also known as Sikorsky Aircraft Corporation, is an American helicopter manufacturer in Stratford, Connecticut, founded by Igor Sikorsky in 1923 and owned by Lockheed Martin since 2015.
Sikorsky CH-124 Sea King
The Sikorsky CH-124 Sea King was a Canadian ship-borne anti-submarine helicopter derived from the Sikorsky S-61, entering Royal Canadian Navy service as the CHSS-2 on May 24, 1963 and serving 55 years until 2018.
Sikorsky CH-148 Cyclone
The Sikorsky CH-148 Cyclone, also known as the Sikorsky Cyclone, is a maritime helicopter built for the Royal Canadian Air Force as a fly-by-wire variant of the Sikorsky S-92.
Sikorsky CH-37 Mojave
The Sikorsky CH-37 Mojave, company designation S-56 and Marine designation HR2S-1, was a twin-piston heavy-lift cargo helicopter of the 1950s flown by the US Marine Corps and Army.
Sikorsky CH-53 Sea Stallion
The Sikorsky CH-53 Sea Stallion (S-65) is a twin-engine heavy-lift transport helicopter built for the US Marine Corps, in service from 1966 through Vietnam and later conflicts, with Navy, Air Force, and export variants.
Sikorsky CH-53E Super Stallion
The Sikorsky CH-53E Super Stallion (S-80) is a three-engine heavy-lift helicopter built by Sikorsky for the United States Marine Corps, delivered from 1981 and now replaced by the CH-53K.
Sikorsky CH-53K King Stallion
The Sikorsky CH-53K King Stallion is a three-engine, fly-by-wire heavy-lift helicopter built by Sikorsky for the United States Marine Corps, which can carry 27,000 pounds externally and entered service in 2022.
Sikorsky CH-54 Tarhe
The Sikorsky CH-54 Tarhe, also known as the CH-54 Skycrane, is a twin-turbine heavy-lift flying crane that served the United States Army in Vietnam from 1962, recovering 380 downed aircraft.
Sikorsky H-34
The Sikorsky H-34, company designation S-58, is an American single-engine piston-powered transport helicopter first flown in 1954, serving as the Army's H-34 Choctaw and Marine UH-34D Seahorse.
Sikorsky HH-60 Pave Hawk
The Sikorsky HH-60 Pave Hawk (HH-60G, originally MH-60G) is a US Air Force combat search and rescue helicopter derived from the Black Hawk, in service from 1982 until 2026.
Sikorsky MH-53
The Sikorsky MH-53 is a family of US heavy-lift helicopters, including the Air Force's Pave Low special operations variant and the Navy's MH-53E Sea Dragon.
Sikorsky MH-60 Jayhawk
The Sikorsky MH-60 Jayhawk, also known as the HH-60J Jayhawk, is a medium-range recovery helicopter the US Coast Guard operates for search and rescue and law enforcement.
Sikorsky R-4
The Sikorsky R-4 was a two-seat helicopter built by Vought-Sikorsky in Connecticut and the world's first production helicopter, first flown by prototype in January 1942.
Sikorsky S-42
The Sikorsky S-42 was a four-engine flying boat built for Pan American Airways, first flown in 1934 and used to survey Pacific and Atlantic routes.
Sikorsky S-61
The Sikorsky S-61, serving with the US Navy as the SH-3 Sea King, is a twin-turboshaft amphibious helicopter developed for anti-submarine warfare, first delivered in 1961.
Sikorsky S-61R
The Sikorsky S-61R, flown as the CH-3 Sea King and HH-3 Jolly Green Giant, is a twin-turboshaft transport and search-and-rescue helicopter first flown in 1963.
Sikorsky S-64 Skycrane
The Sikorsky S-64 Skycrane, also known as the S-64 Aircrane, is an American heavy-lift helicopter that first flew in 1962, serving the Army as the CH-54 Tarhe.
Sikorsky S-70
The Sikorsky S-70, known in US Army service as the UH-60 Black Hawk, is a twin-engine medium utility helicopter whose prototype first flew in 1974.
Sikorsky S-76
The Sikorsky S-76, briefly named Spirit, is a twin-engine commercial helicopter built by Sikorsky Aircraft; first flown in 1977, it serves offshore oil, airline, and executive roles.