BTW or btw may refer to:BTW (company), a Chinese manufacturer BTW (conference), a conference series about information technology Bak–Tang–Wiesenfeld sandpile, a cellular automaton model British Traditional Wicca, a set of Wiccan traditions originating in the New Forest region Buckfast Tonic Wine, a fortified wine licensed from Buckfast Abbey in Devon The Brotherhood of Timber Workers, 1910s labor union Burlington Trailways, an Inter-city bus company BTW, in Bunbury, Western Australia "B.T.W", a 2021 song by Jay B and Jay Park