•
Tailwind Airlines (ICAO code), Turkish charter airline •
Tolerable weekly intake, an estimate of the amount of a harmful substance that can be safely ingested •
The Way International, a religious organization considered by some to be a cult •
The Welding Institute, a research and technology organisation based in the UK •
Tin Wing stop (MTR station code), a Light Rail stop in Hong Kong •
Topographic Wetness Index, an algorithm based on slope and flow accumulation •
Trade weighted index, an economic instrument used to compare exchange rates •
Training Within Industry, a service in the US that provided consultancy to war-related industries during World War II •
Trans World International, a distributor and producer of televised sports • Tread Wear Indicator, a safety indicator on vehicle tyres (tires) shown in the
Tire code •
Twickenham railway station (National Rail station code), a railway station in London •
Two-wire interface, a variant of I²C •
Two-way immersion, a form of dual language education ==See also==