Engineering
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- SAE InternationalProfessional association and standards organization for transport and other industries
- Safety engineeringEngineering discipline
- Safety stockExtra stock kept to mitigate risks
- Safety valveDevice for releasing excess pressure in a system
- Sales engineeringHybrid profession of sales and engineering
- Sandwich-structured compositeMaterial composed of two thin, stiff skins around a lightweight core
- Santiago CalatravaSpanish-Swiss engineer and architect (born 1951)
- Savannah River PlantU.S. Department of Energy reservation in South Carolina
- Sayano-Shushenskaya power station accident2009 turbine failure at a hydroelectric power station in Russia
- SCADAControl system architecture for supervision of machines and processes
- Scheduling (production processes)Process of arranging, controlling and optimizing work and workloads
- Scope creepProject management issue
- Screw threadHelical structure used to convert between rotational and linear movement or force
- Scroll-type superchargerThe scroll-type supercharger is a scroll compressor used as a positive displacement orbiti
- SDI (engine)Type of diesel engine
- SealantSubstance used to block the passage of fluids through openings
- Seismic analysisSeismic analysis is a subset of structural analysis and is the calculation of the response
- Self-healing concreteMaterials science concept
- Septic drain fieldType of subsurface wastewater disposal facility
- Setting up to failForm of workplace bullying and no-win situation
- Sharpness (cutting)Ability to cut through materials
- ShcramjetShock-induced combustion ramjet engine
- Shear and moment diagramStructural design tool
- Sherif IsmailPrime Minister of Egypt from 2015 to 2018
- Shim (spacer)Thin piece of material used to fill small gaps or spaces
- Ship's chronometer from HMS BeagleA nautical chronometer made by Thomas Earnshaw (1749–1828), and once part of the equipment
- Silicone greaseWaterproof grease made by combining a silicone oil with a thickener
- SilverpointSilverpoint (one of several types of metalpoint) is a traditional drawing technique and to
- Simulation softwareSoftware that models a real phenomenon with a set of mathematical formulas
- Single-molecule electric motorThe single-molecule electric motor is an electrically operated synthetic molecular motor m
- Single-stage-to-orbitLaunch system that only uses one rocket stage
- Six Thinking Hats1985 book by Maltese Dr. Edward de Bono
- Six-column beam engineSix-column beam engines are a type of beam engine, where the beam's central pivot is suppo
- Sketch (drawing)Quickly executed freehand drawing
- Slip bands in metalsDeformation mechanism in crystallines
- Smethwick EngineWatt steam engine
- Society for Industrial ArcheologyFile:Society for Industrial Archeology-logo.jpg The Society for Industrial Archeology (SIA
- Socket wrenchLever with interchangeable socket heads to grip or turn a bolt or nut
- Software engineeringEngineering approach to software development
- Space elevatorProposed type of space transportation system
- Space industry of ScotlandSpace industry
- Speed tapeAluminum tape for vehicle repairs
- Spherical roller bearingRolling-element bearing that tolerates angular misalignment
- Spiral bevel gearMechanical part
- Standard wind tunnel modelsStandard wind tunnel models, also known as reference models, calibration models (French: m
- State of the artHighest development that can be achieved
- Stationary steam engineFixed steam engine for pumping or power generation
- Statue of Jorge Matute Remus (Centro, Guadalajara)A statue of Jorge Matute Remus is installed in front of a Telmex building on Juárez Avenue
- Steam power during the Industrial RevolutionImprovements to the steam engine were some of the most important technologies of the Indus
- Steelyard balanceType of weight scale
- Steeple compound engineForm of tandem compound steam engine
- Stencil printingStencil printing is the process of depositing solder paste on the printed wiring boards (P
- Stochastic schedulingStochastic scheduling concerns scheduling problems involving random attributes, such as ra
- Stonecutters BridgeStonecutters Bridge is a high level cable-stayed bridge spanning the Rambler Channel in Ho
- Straight-three engineType of engine
- Stratford Market DepotStratford Market Depot is a London Underground depot located in Stratford in the London Bo
- Straw man proposalBusiness term
- Stress concentrationLocation in an object where stress is far greater than the surrounding region
- Stressed skinIn mechanical engineering, stressed skin is a rigid construction in which the skin or cove
- Stroke (engine)Phase of an engine piston's travel
- Structural drawingTechnical drawing detailing the specifications of a structure
- Structural engineerDesigner, researcher and planner of buildings and similar objects
- Structural integrity and failureAbility of a structure to support a designed structural load without breaking
- Subaru B5 TPHThe Subaru B5-TPH was a concept shooting-brake coupe with a Turbo Parallel Hybrid (TPH) po
- Subsurface engineerSubsurface engineers (also known as "completion engineers") are a subset within Petroleum
- Surface metrologyMeasurement of small-scale features on surfaces
- Surgical stainless steelSurgical stainless steel is a grade of stainless steel used in biomedical applications. Th
- Sweden and weapons of mass destructionDuring the late 1940s and 1950s, Sweden had programs for both nuclear and chemical weapons
- Synchronous motorType of AC motor
- SynergyCreation of a whole that is greater than the simple sum of its parts
- Synthetic oilLubricant consisting of artificially made chemical compounds
- System integration testingTesting a complete system with multiple components