- Weapons-grade
- Wear
- Wear coefficient
- Wear leveling
- Wearable computers
- Wearable technology
- Weardale granite
- Wearing course
- Weather balloons
- Weather forecasting
- Weather modification
- Weather radar
- Weather satellites
- Weathering
- Weathering steel
- Web
- Web Accessibility Initiative
- Web GIS
- Web Ontology Language
- Web accessibility
- Web analytics
- Web applications
- Web browsers
- Web conferencing
- Web content
- Web content management system
- Web crawlers
- Web design
- Web development
- Web directory
- Web forms
- Web framework
- Web hosting
- Web indexing
- Web map service
- Web navigation
- Web of Science
- Web of Things
- Web of trust
- Web page
- Web portals
- Web resource
- Web scraping
- Web server
- Web services
- Web standards
- Web testing
- Web traffic
- Web-based simulation
- Web3
- WebDAV
- WebGL
- WebKit
- WebRTC
- WebSockets
- WebXR
- Webcam
- Webcrawler
- Weber
- Weber number
- Webmasters
- Webp
- Webs
- Website
- Website spoofing
- Websterite
- Weddellite
- Wedge base
- Wedge prism
- Wedges
- Weep
- Wehrlite
- Weibull distribution
- Weibull fading
- Weibull modulus
- Weierstrass M-test
- Weigh in motion
- Weighbridge
- Weight
- Weight bearing
- Weight distribution
- Weight gain
- Weight transfer
- Weight-bearing
- Weighted arithmetic mean
- Weighted average cost of capital
- Weighted geometric mean
- Weighted least squares
- Weighted majority algorithm
- Weighted median
- Weighted product model
- Weighted round robin
- Weighted sum
- Weighted sum model
- Weighting
- Weighting curve
- Weighting filters
- Weir
- Weka
- Welch's method
- Welch's t-test
- Weld access hole
- Weld inspection
- Weld line
- Weld pool
- Weldability
- Welded wire mesh
- Welding
- Welding helmet
- Welding joints
- Welding procedure specification
- Well building standard
- Well cementing
- Well control
- Well drainage
- Well drilling
- Well integrity
- Well intervention
- Well logging
- Well stimulation
- Well test
- Well testing
- Well-formed formula
- Well-ordering theorem
- Well-posed problem
- Wellhead
- Wendelstein 7-X
- Wernicke's area
- West
- West Nile virus
- West Spitsbergen Current
- Western Electric Rules
- Western Interconnection
- Western blot
- Western boundary currents
- Westmere
- Wet chemistry
- Wet gas
- Wet scrubber
- Wet sump
- Wet-bulb temperature
- Wetlands
- Wetsuit
- Wettable powder
- Wetted area
- Wetted perimeter
- Wetting
- Wetting layer
- Wetting transition