TW or tw may refer to:
Twitter () is an online news and social networking service on which users post and interact with messages known as "tweets".
Two and a Half Men is an American television sitcom that originally aired on CBS for twelve seasons from September 22, 2003 to February 19, 2015. Originally starring Charlie Sheen, Jon Cryer, and Angus T.
Twin Peaks is an American mystery horror drama television series created by Mark Frost and David Lynch that premiered on April 8, 1990, on ABC.
Twelver (Arabic: اثنا عشرية, translit. Athnā‘ashariyyah or Ithnā‘ashariyyah; Persian: شیعه دوازده امامی, pronounced [ʃiːʔe-je dævɑzdæh emɑmiː]) or Imamiyyah (Arabic: إمامية) is the largest branch of Shia Islam.
Twelfth Night, or What You Will is a comedy by William Shakespeare, believed to have been written around 1601–02 as a Twelfth Night's entertainment for the close of the Christmas season.
Trans World Airlines Flight 800 (TWA 800) was a Boeing 747-100 that exploded and crashed into the Atlantic Ocean near East Moriches, New York, on July 17, 1996, at about 8:31 p.m.