S Curve
S Wave
S.O.S
Sack
Sacrificial Anode
Sacrificial Pigment
Sacrificial Protection
SADT (Structured Analysis and Design Technique)
Safe
Safe Drinking Water Act (SDWA)
Safe Work Practices
Safeguard
Safety
Safety Design Philosophy
Safety Equipment Schedule
Safety Instrumented Functions (SIF)
Safety Instrumented System (SIS)
Safety Interlocking
Safety Layer
Safety Review
Safety Signs Drawing
Safety System
Safety Talk
Safety Toolbox Meeting
Safety Topic
Safety Valve
SAFSTOR (Safe Storage)
Sag or Sagging
Said to Contain (STC)
Sale
Sales Gas
Saline Water
Salinity
Salinization
Salt
Salt Cavity Storage
Salvage Value
Samaritan’s Purse
Samarium (Sm)
Sample
Sample Design
Sample Survey
Sampling
Sampling Bias
Sampling Technique
Sampling Variance
Sanction
Sand
Sanitary Regulation
SAP
Saponification
SARS (Severe Acute Respiratory Syndrome)
SAT (Site Acceptance Test)
Satellite
Satellite Instrument House (SIH)
Satellite Navigation (SN)
Satellite Power System (SPS)
Satisfaction
SATP (Standard Ambient Temperature and Pressure)
Saturate
Saturated Fat
Saturated Hydrocarbon
Saturated Solution
Saturation
Saturn
Save
Saving
SCADA (Supervisory Control and Data Acquisition)
Scaffolding
Scale
Scale Deposit
Scale-up
Scaling
Scalping
Scan
Scandium (Sc)
Scanner Data
Scanning
Scanning Electron Microscope
Scatter
Scatter Diagram
Scatter Plot
Scavenger
Scenario
Scenario Analysis
SCC (Stress Corrosion Cracking)
SCES (Safety Critical Elements)
scf (Standard Cubic Foot), MMscf (Million Standard Cubic Feet)
Schedule
Schedule Availability
Schedule Buffer
Schedule Control and Management
Schedule of Events
Schedule Revision
Schedule Risk Assessment
Schedule Volatility
Schedules of Doors and Windows
Schedules of Finishes (Buildings)
Scheduling
Schema
Science
Scientific Literacy
Scientific Method
scm (Standard Cubic Metre, m3), MMscm (Million Standard Cubic Metres)
Scope
Scope Change
Scope Management
Scope of Facility (SOF)
Scope of Service (SOS)
Scope of Work (SOW)
Score Function
Scout
Scrap
Screen
Screening
Screw
Screw Compressor
Screw Pump
Scrubber
Scrubbing
Scrum (Software Development)
SDMX (Statistical Data and Metadata eXchange)
SDS (Safety Data Sheet)
Sea Level
Seaborgium (Sg)
Seal
Sealant
Sealed Combustion Heating System
Sealer
Seam
Search
Search Engine
Seasonal Adjustment
Seasonal Energy Efficiency Ratio (SEER)
Seasonal Normal
Seasonal Performance Factor (SPF)
Seasonal Product
Seasonal Storage
Seating Nipple
Seawater
Second (s)
Second Generation Biofuels
Second Law Efficiency
Second Law of Thermodynamics
Secondary Air Pollution
Secondary Battery (or Rechargeable Battery)
Secondary Disclosure Risk
Secondary Extraction
Secondary Market
Secondary Wastewater Treatment
Secrecy Agreement
Secrete
Sector
Sectoral Strategy
Securities Settlement System (SSS)
Securitisation
Security
Security Plan
Security Risk
Security Vulnerability Analysis (SVA)
Sediment
Sedimentation
Sedimentation Tank
Seebeck Effect
Seed
Seed Bank
Seepage
Segregate
Segregation
Seismic
Seismic Moment
Seismic Survey
Seismometer (or Seismograph)
Selective Absorber
Selective Surface Coating
Selectivity
Selenium (Se)
Self Discharge
Self Employment
Self Enumeration
Self Insurance
Self Priming Pump
Self-Accelerating Decomposition Temperature (SADT)
Self-Ignition
Self-reactive
Self-sufficiency
Sell
Seller's Market
Selling Below Cost
Semantics
Semi-Batch Reactor
Semi Quantitative Risk Analysis
Semiconductor
Semimetal
Sensible
Sensible Cooling Effect
Sensible Cooling Load
Sensible Heat
Sensible Heat Storage
Sensitisation (Sensitization)
Sensitiser (or Sensitizer)
Sensitising Heat Treatment
Sensitive Variable
Sensitivity
Sensitivity Analysis
Sensor
Sentence
Separability
Separation
Sepsis
Septic Tank
Sequence
Sequence Control
Sequential
Sequential Control System
Sequential Programme
Series
Series Controller
Series Resistance
Serious Injury
Server
Service
Service Agreement
Service Water
Serviceability
Setback Thermostat
Settle
Settlement Risk
Severability
Severance
Severe
Severity
Sewage
Sewage Treatment Plant
Sewer
Sewerage
SF (Start to Finish)
SFAIRP (So far as is Reasonably Practicable)
Shading Coefficient
Shadow Economy
Shaft
Shale
Shale Gas
Shale Oil
Shallow Groundbed
Share
Share Prices Index
Shared or Joint Monopoly
Shareholder
Shareholder Agreement
Sharing Economy
Shear
Shear Stress (τ)
Sheathing
Shelf Life
Shelf Life of Battery
Shell
Shell and Tube Heat Exchanger
Shelter in Place
Sheriff
Shielding
Shift Work (or Work Shift)
Ship
Shipment
Shipment Capacity Measurement
Shipper
Shipping Document
Shipping Insurance
Shipping List
Shock Wave
Shoe
Shop Coat
Shop Inspection
Short Circuit
Short Circuit Current
Short Term Commitment or Credit
Short Term Interest Rate
Short Ton
Shortwave Radiation
Shot Blasting
Shot Peening
Shrink
Shunt Load
Shunt Regulator
Shut Off Valve (or Shut Down Valve)
Shutdown (S/D)
Shutter
Shuttle Algorithm
SI (International System) Unit
Sibling Group
Siding
Siemens
Sievert
SIF (Safety Instrumented Function)
Sigma ( Σ, σ )
Sigma Heat
Sigma Phase
Signal
Signature
Significance
SIL (Safety Integrity Level)
Silicate
Silicon (Si)
Silt
Silver (Ag)
Silviculture
SIMOPS (Simultaneous Operations)
SIMOPS (Simultaneous Operations) Risk Assessment
Simple Sample
Simulation
Sine Die
Sine Wave
Single Hull
Single-Phase
Singles' Day (Guanggunn Jie)
Single-use
Singularity
Sinkhole
Sinking Fund
SIS (Safety Instrumented System)
Site
Site Investigation
Site Manager (Construction Manager)
Site Preparation
Six Sigma
Size
Sizing
Skeletal Structure
Skeleton
Sketch
Skid
Skid Mounted Construction
Skill
Skill Based Behaviour
Skin
Skin Cancer
Skylight
Skyrocket
Slab
Slack
Slag
Slagging
SLD (Single Line Diagram)
Sleep Apnea
Slide
Slip
Slip Joint
Slip on Flanges (or Slip Flange)
Slosh
Sludge
Slug
Slug Catcher
Slurry
Slurry Pump
Slushing Compound
Small Modular Reactor (SMR)
Smart
Smart Card
Smart Casual
Smart City
Smart Factory
Smart Grid
Smart Home (Intelligent Living)
Smart Window
Smear Survey (Wipe Test)
Smelt
SMEs (Small and medium-sized Enterprises)
Smog
Smoke
Smoldering
Smooth
Smoothing
Smuggling
Snag
Snapchat
Snell's Law
SNG (Synthetic Natural Gas)
SNS (Social Networking Service)
Snub
Soak
Sobriety
SOC (Social Overhead Capital)
SOC (Standard Occupational Classification) System
Social
Social and Political (RSP)
Social Benefit
Social Capital
Social Contribution
Social Security
Social Security Fund
Socialism
Societal Risk
Society
Society of Petroleum Engineers (SPE)
Socioeconomic
Socket Weld Flange
Sodium (Na)
Sodium Carbonate (Na2CO3, or Washing Soda, Soda Ash)
Sodium Chloride (NaCl)
Sodium Cyanide
Sodium Hydroxide (NaOH)
Sodium Light
Sodium Sulphate (Na2SO4)
Soffit
Soft Target
Soft Water
Softener
Software
Software Interlock
Soil
Soil Boring Test
Soil Degradation
Soil Quality
Soil Resistivity Testing
Solar
Solar Air Heater
Solar Altitude Angle
Solar Architecture
Solar Array
Solar Azimuth
Solar Battery
Solar Cell Efficiency
Solar Cell, Solar Panel, Solar Battery or Photovoltaic (PV) Cell
Solar Collector
Solar Constant
Solar Cooling
Solar Declination
Solar Distillation
Solar Energy
Solar Energy Industries Association (SEIA)
Solar Energy Research Institute (SERI)
Solar Film
Solar Fraction
Solar Furnace
Solar Gain
Solar Grade Silicon
Solar Impulse
Solar Inverter (or Grid-Tied Inverter)
Solar Irradiation
Solar Module
Solar Panel
Solar Power Plant
Solar Power Satellite
Solar Radiation
Solar Resource
Solar Simulator
Solar Space Heater
Solar Spectrum
Solar System
Solar Thermal Electric System
Solar Thermal Parabolic Dish
Solar Thermal System
Solar Tile
Solar Time
Solar Transmittance
Solar Urticaria
Solarium
Solder
Solenoid
Solenoid Valve
Solicit
Solicitor
Solicitor and Client Costs
Solid
Solid-State Battery
Solid Oxide Fuel Cell (SOFC)
Solid Solution
Solid Waste
Solidification
Solidity
Solstice
Solubility
Soluble
Solute
Solution
Solution as a Service (SaaS)
Solution Gas
Solution Heat Treatment
Solve
Solvent
Solvent Cleaning
Somatic Cell
Sonic
Soot
SOP (Standard Operating Procedure)
Sophisticate
Sound
Sour
Sour Crude
Sour Gas
Source
Source Data
Source Mode Output
Source Term
Sovereign
Space
Space Heater
Spacer
Spaceship
Spalling
Spam
Spare
Spare Part
Spare Parts Optimisation
Spark Discharge
Spark Spread
Spark Test
Spatial Data
Special Cause of Variation
Special Damages
Special Pipe Support Register
Special Piping (SP) Item Schedule and Datasheet
Special Precaution
Special Protection Information
Special Terms and Conditions
Specialisation (Specialization) Agreement
Specialise
Specialised Survey
Species
Specific Conductance
Specific Gravity
Specific Heat
Specific Heat Capacity
Specific Humidity
Specific Impulse
Specific Volume
Specification
Specification Pricing
Specifications Defining Functionality of Systems and Interface
Specifications for Building
Spectator Ion
Spectral Irradiance
Spectral Reflectance
Spectroscopy
Spectrum
Spend
Spent Nuclear Fuel (SNF)
SPI (Schedule Performance Index)
Spill or Leak Procedure
Spillway
Spinning Reserve
Spinning Riffler
Spiral
Spirit
Spirituality
Splash
Splash Zone
Splicing
SPMT (Self-Propelled Modular Transporter)
Spontaneous
Spontaneous Process
Spontaneous Reaction
Spontaneously Combustible
Spot LNG
Spot Market Pricing
Spot Rate
Spot Trading
Spray
Spray Pyrolysis
Spread
Spreader
Spreader Stocker
Spreadsheet
Spring
Sprinkler
Sprint (Software Development)
Sputtering
SQC (Statistical Quality Control)
Square
Square Cube Law
Square Wave
Squeeze
SR&CC (Strikes, Riots and Civil Commotions)
SS (Start to Start)
SSC (Sulphide Stress Cracking)
Stab In
Stabilisation (Stabilization)
Stability
Stabilisation Fund (or Payment)
Stabilise
Stable
Stable Material
Stack
Stack (Heat) Loss
Staff
Stage of Production
Stagflation
Staging
Stagnation Temperature
Stain
Stainless Steel
Stakeholder
Stakeholder Management
Stalking Horse
Stall
Stamp Duty
Stamp Tax
Stand Alone Generator
Stand Alone Inverter
Stand Alone System
Standard
Standard Ambient Temperature and Pressure (SATP)
Standard Assessment Procedure (SAP)
Standard Classification
Standard Condition
Standard Deviation
Standard Industrial Classification (SIC) Code
Standard Pipe Size
Standard Piping Detail
Standard Reporting Conditions (SRC)
Standard Solution
Standard Specification
Standard Tax Relief
Standard Test Conditions (STC)
Standardisation (Standardization)
Standby Agreement
Standby Credit
Standby Current
Standby Heat Loss
Standby Letters of Credit (L/C)
Standby Mode
Standby Power
Standby Power System
Standing Charge
Standing Facility
Standing Valve
Standpoint
Standstill
Starboard
Starch
Startup (Company)
Startup Funding Stage
Start-up
Starting Surge
Starting Torque
State
State Government
State Indicator
State of Charge (SOC)
State of Matter
State of the Art
State Trading Enterprise
Stateless Person
Statement
Statement of Claim
Statement of Defence
Static Electricity
Static Pressure
Statics
Statin
Stationary Condition
Stationary Equipment
Statistic
Statistical Characteristic
Statistical Concept
Statistical Confidentiality
Statistical Data
Statistical Disclosure
Statistical Equilibrium
Statistical Hypothesis
Statistical Indicator
Statistical Information System
Statistical Measure
Statistical Method
Statistical Process Control (SPC)
Statistical Processing
Statistical Standard
Statistical Subject Matter Domain
Statistics
Statistics Code
Status
Statute
Statutory Requirement
STB
Steady
Steady State
Steam
Steam Assisted Gravity Drainage (SAGD)
Steam Boiler
Steam Coal
Steam Cracking
Steam Distillation
Steam Generator
Steam Reforming
Steam Trace Heating
Steam Trap
Steam Turbine
Steam turbine Generator
Steel
Stem
STEM (Science, Technology, Engineering, and Mathematics)
Stem Cell
Step Potential
Steradian (sr)
Stern
Stewardship
Stick
Stick and Slip
Stick built
Sticky
Still Gas
Stimulant
Stimulate
Stimulation
Stimuli
Stipulate
Stirling Engine
STL (STereoLithography or Standard Triangle Language)
Stochastic
Stochastic Modelling
Stock
Stockpile
Stoichiometric Concentration
Stoichiometric Mixture
Stoichiometric Ratio
Stoichiometry
Stone
Stone Weight (st.)
Stool
Stopple
Storage
Storage Battery
Storage Capacity
Storage Hydropower
Storage Tank
Storage Water Heater
Storm Door
Storm Sewer
Storm Water
Stowing
STP (Standard Temperature and Pressure)
Straddle
Straddle Plant
Straight Run
Straight Through Processing (STP)
Strain
Strainer
Strait of Hormuz
Stranded Investment (Costs and Benefits)
Strategic Alliance
Strategic Behaviour
Strategic Conflict Assessment
Strategic Financial Management
Strategic Reserve
Strategy
Stratification
Stratify
Stratopause
Stratosphere
Stream
Streaming Current
Strength
Strengthen
Stress
Stress Analysis Specification
Stress Corrosion Cracking (SCC)
Stress Critical Line List
Stress Management
Stress Relieving (thermal)
Stress Sketch
Stress Test
Stretch
Strike
String
Stripped Security
Stripping
Stroke
Strong Sustainability
Strontium (Sr)
Structural
Structural Adjustment
Structural Design Criteria
Structural Engineering
Structural Fund
Structural Load Analysis
Structural Steel
Structural Steel Layout and Details
Structural Steelwork Specification
Structure
Structured Bond
Stuck
Stud
Stuff
Stuffing
Styrene (C8H8 or C6H5CHCH2)
Styrene Resin
Subcontractor
Subject
Subject Matter Statistician
Subject to Contract
Subjective Health
Sublimation
Submarine
Submerged Zone
Submersible Pump
Submission
Subordinate
Subordinated Bond
Subpoena
Subscription Business
Subsequent
Subshell
Subsidence
Subsidiary
Subsidised Price
Subsidy
Subsoil Asset
Substance
Substantiate
Substation
Substation Layout Drawing
Substituent
Substitute
Substitution
Substitution Reaction
Substrate
Subsurface Pressure
Subsurface Safety Valve (SSSV) or Downhole Safety Valve
Subsystem
Subtract
Success
Success Story
Successor (Activity)
Suction
Suction Pit
Sudden
Suggest
Suggestion
Suit
Sulfidation
Sulfonation
Sulfurise (Sulfurize)
Sulphate
Sulphide
Sulphite
Sulphur (Sulfur) Dioxide (SO2)
Sulphur
Sulphur (Sulfur) Oxides (SOx)
Sulphuric (Sulfuric) Acid (H2SO4)
Summary
Summons
Sunk Cost
Super Tanker
Superannuation
Superconducting Magnetic Energy Storage (SMES) System
Superconductivity
Superconductor
Superficial
Superficial Velocity
Superheated Liquid
Superintendent
Supernatant
Supernate
Supernova
Supersaturation
Supersede
Superstrate
Supertask
Supervisor
Supervisory Board
Supplementary
Supplementary Heat
Supplier
Supplier Credit
Supply
Supply and Demand
Supply Bond
Supply Contract
Supply Control
Supply Chain
Supply Chain Management
Supply Quota
Support
Suppressant
Suppression
Surcharge
Surety
Surety Bond
Surface
Surface Profile
Surface Resistivity (rs)
Surface Tension
Surface Water
Surface Water Loop
Surfactant
Surge
Surge Capacity
Surge Tank
Surgery
Surgical
Surpass
Surplus Material
Surveillance
Survey
Survey Management
Survival
Susceptibility
Susceptible
Suspend
Suspended Sediment
Suspended Solid
Suspension
Sustain
Sustainability
Sustainable Development
Sustainable Development Goals (SGDs)
Sustainable Development Scenario (SDS)
SV (Schedule Variance)
Swab
Swage
Swamp
Swamp Cooler
Swap
Sway
Sweet
Sweet Crude
Sweet Gas
Sweetening
Swift
SWIFT (Society for Worldwide Interbank Financial Telecommunication)
Swing Check Valve
Switchgear
Switchgear Building Equipment Layout
SWOT (Strengths, Weaknesses, Opportunities and Threats)
Symbol
Symbol and Legend
Symmetric
Symmetric Index
Symptom
Synchronise
Synchronous
Synchronous Generator
Synchronous Inverter
Synchronous Motor
Syndicate
Syndicated Loan
Synergy
Syngas (Synthesis Gas)
Synonym
Syntax
Synthesis
Synthesis Reaction
Synthetic
Synthetic CDO (Collateralised Debt Obligation)
Synthetic Rubber
System
System Availability
System Block Diagram
System Designer
System Documentation
System Evaluation
System Generation
System Graphic Display
System Interaction
System Manual
System Software
Systematic
Systematic Design
Systematic Error
Systematic Variation
Systemic Risk
Systems Engineering
