HW

HW can signify:
* Halo Wars, an upcoming real-time strategy game for the Xbox 360 based on the Halo series, developed by Ensemble Studios.
* Hardware
* Hello (airline) IATA airline designator
* Heriot-Watt University, Edinburgh
* Homework
* Hot Wheels, a toy car and manufactured by Mattel
* Hotwire, the band
* Hutchison Whampoa, a company corporated in Hong Kong and China
* North-Wright Airways IATA airline designator
* Homeworld, a computer game in the real-time strategy genre.
* Harvard-Westlake, a private college-preparatory school in North Hollywood, CA
* Former President George H. W. Bush
* Housewife