STIV or Stiv may refer to: Sulfolobus turreted icosahedral virus 1 (STIV1) formerly "sulfolobus turreted icosahedral virus" (STIV) Star Trek IV: The Voyage Home, fourth film in the original film series Untitled sequel to Star Trek Beyond, fourth film in the J.J.Abrams film series, see Star Trek Beyond#Sequel Société des Transports Intercommunaux de Verviers, a former Belgian transport company Starship Troopers: Invasion, fourth film in the Starship Troopers film series Stiv Bators (1949–1990), American punk rock musician
See also ST4 (disambiguation)