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Siltronic
Siltronic AG is a German manufacturer of silicon wafers, the hyperpure crystalline discs on which memory chips, microprocessors, and power semiconductors are built, with production in Asia, Germany, and the United States.
Silvaco
Silvaco is a Santa Clara, California-based provider of technology computer-aided design (TCAD) and EDA software and semiconductor IP, founded in 1984 and public on Nasdaq since May 2024.
Silver Airways
Silver Airways was a regional airline based in Hollywood, Florida, that flew within Florida and to the Bahamas and the Caribbean from 2011 until ceasing operations in June 2025.
Silver Bridge
The Silver Bridge, also called the Point Pleasant Bridge, carried US Route 35 over the Ohio River from 1928 until its 1967 collapse, which killed 46 people.
Silver Fern railcars
The Silver Fern railcars are three diesel-electric railcars built in Japan in 1972 for New Zealand Railways, which ran the named Silver Fern service on the Wellington–Auckland daylight run until 1991.
Silver hallmarks
Silver hallmarks are official marks struck on silver by an independent assay office to certify the metal's purity, legally required in the UK since a statute of 1300.
Silver Line (Washington Metro)
The Silver Line, also known as Dulles Metrorail, is a 23-mile Washington Metro extension through Tysons, Reston, and Washington Dulles International Airport to Ashburn, opened in phases in 2014 and 2022.
Silver nanowire transparent heater
A silver nanowire transparent heater is a see-through electrothermal device in which a percolating silver nanowire film converts electricity into heat while transmitting 80 to 98% of visible light.
Silver paste
Silver paste is a screen-printable ink of silver particles, glass frit, and binders that forms the electrical contacts of crystalline silicon solar cells, the dominant metallization method in photovoltaic manufacturing.
Silver Spring Networks
Silver Spring Networks was an American smart grid networking company for utilities and cities, headquartered in Redwood City, California, and acquired by Itron in January 2018.
Silver-indium-cadmium
Silver-indium-cadmium is a silver alloy containing about 15 percent indium and 5 percent cadmium, used as the neutron-absorbing core of control rods in pressurized water reactors.
Silver-oxide battery
A silver-oxide battery is a non-rechargeable button cell using silver oxide and zinc electrodes to deliver a nearly constant 1.55 volts, powering analog quartz watches, calculators, and precision instruments.
Silverplate
Silverplate, also known as the Silver Plated Project, was the secret Manhattan Project program that modified B-29 bombers to deliver the atomic bombs dropped on Hiroshima and Nagasaki in 1945.
Silvertown Tunnel
The Silvertown Tunnel is a 1.4 km tolled twin-bore road tunnel under the Thames in east London, opened in April 2025 to relieve congestion at the nearby Blackwall Tunnel.
Silvio Micali
Silvio Micali, born in Palermo, Italy in 1954, is an MIT computer scientist known for co-inventing zero-knowledge proofs and probabilistic encryption and for winning the 2012 Turing Award.
Silvio Pettirossi International Airport
Silvio Pettirossi International Airport (Aeropuerto Internacional Silvio Pettirossi) is Paraguay's principal international airport, located in Luque about 15 km from central Asunción and serving as the hub for LATAM Paraguay and Paranair.
Silvio Savarese
Silvio Savarese is an Italian computer scientist who serves as Chief Scientist of Salesforce AI Research and is an adjunct professor of computer science at Stanford University.
Silvio Scaglia
Silvio Scaglia, also known as Silvio Scaglia Haart, is an Italian telecommunications entrepreneur who co-founded Fastweb in 1999, led Omnitel, and later built La Perla and Elite World.
SIM Application Toolkit
The SIM Application Toolkit, also known as SIM Toolkit or STK, is a set of standardized commands letting SIM card applications control a phone's display, calls, and messaging.
SIM card
A SIM card, or subscriber identity module, is a smart card that identifies a subscriber to a mobile network; the first commercial one was delivered in 1991.
SIM lock
A SIM lock, also called a subsidy or carrier lock, is a restriction that makes a mobile phone reject SIM cards from networks other than its original carrier.
Sim-to-real transfer
Sim-to-real transfer is the set of techniques for making robot policies trained in simulation work on physical robots, closing the reality gap caused by mismatched dynamics, sensors, and environments.
SIMA 2
SIMA 2 is a generalist embodied agent by Google DeepMind, announced in November 2025, that perceives 3D virtual worlds through video and acts via keyboard and mouse.
SimActive Correlator3D
SimActive Correlator3D is photogrammetry software developed by SimActive Inc. of Montreal, Canada, that generates digital surface models, orthomosaics, point clouds, and 3D models from drone, aircraft, and satellite imagery.
SIMATIC
SIMATIC is the Siemens brand name for its family of industrial automation products, including programmable logic controllers, HMI devices, industrial PCs, and the PCS 7 process control system, engineered in the TIA Portal.
SIMBAD
SIMBAD, the Set of Identifications, Measurements and Bibliography for Astronomical Data, is an online database of astronomical objects outside the Solar System, run by the CDS in Strasbourg, France.
Simbionix
Simbionix is an Israeli medical simulation company founded in the late 1990s that develops virtual reality simulators for training surgeons, including the LAP Mentor and GI Mentor.
Simbody
Simbody is an open-source C++ multibody dynamics library developed at Stanford under NIH funding; it serves as the dynamics engine behind OpenSim and is used in the Gazebo robotics simulator.
Simca
Simca (Société Industrielle de Mécanique et de Carrosserie Automobile) was a French carmaker founded by Fiat in 1934, led by Henri Pigozzi, sold to Peugeot in 1978 and renamed Talbot in 1979.
Simcenter
Simcenter is a portfolio of engineering simulation and physical testing software from Siemens Digital Industries Software, launched in 2016 and expanded by the roughly $10 billion Altair acquisition in 2025.