HH4 or HH-4:
Field of Dishonor, the fourth novel in the Honor Harrington series by David Weber, abbreviated HH4 HH4, a model in the series of Honda Acty trucks 01444 — Haywards Heath (HH4), West Sussex, England, UK; see list of dialling codes in the United Kingdom HH4, one of the Hamburger–Hamilton stages in chick development
See also
H4 (disambiguation)