HH1 or HH-1 may refer to:

Vehicular and transportation edit

Other uses edit

  • Tetulomab (HH1), an experimental cancer drug
  • HH1, one of the Hamburger–Hamilton stages in chick development
  • HH 1, the first Herbig-Haro object identified
  • On Basilisk Station (novel), abbreviated "HH1", first main-line novel in the Honor Harrington novel series, part of the Honorverse fictional milieu created by David Weber

See also edit