TW may refer to:
Republic of China (Taiwan), as its
ISO 3166-1 alpha-2 country code.
Taiwan, as the island and the surrounding territories itself.
TW postcode area (Twickenham postcode area), a group of 20 postal districts in southwest Greater London.
Terawatt, a unit of power.
Trans World Airlines (IATA code: TW), a defunct airline.
Telford and Wrekin, a borough in Shropshire, England.
Time Warner, a large media company.
Tiger Woods, an American golfer.
Technical writer, a person who writes technical documentation.
Teresa Wentzler, a cross-stitch and fantasy artist.
TribalWar, an online gaming discussion forum.Tropical worsted, a type of
worsted fabric
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Taiwan (Rep. of China)