TW or tw may refer to:
Twitter () is an online news and social networking service where users post and interact with messages, "tweets", restricted to 140 characters.
Twin Peaks is an American mystery drama television series created by Mark Frost and David Lynch that premiered on April 8, 1990, on ABC.
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.
Twins are two offspring produced by the same pregnancy. Twins can be either monozygotic ("identical"), meaning that they develop from one zygote, which splits and forms two embryos, or dizygotic ("fraternal"), meaning that they develop from two different eggs.
Twin Peaks, also known as Twin Peaks: The Return, is an American mystery drama television revival series created by Mark Frost and David Lynch.
Twelver (Arabic: اثنا عشرية, 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.