HDM stands for:

  • HDM air rescue, formerly Team DRF, a daughter of the DRF Air Rescue
  • Heidelberger Druckmaschinen AG, one of the world's leading manufacturer of sheetfed offset printing machines
  • Chest compressions, see cardiopulmonary resuscitation
  • Call sign of a radio beacon, HDM ( NDB )
  • Hot dark matter

HdM stands for:

  • Herzog & de Meuron, the Swiss architecture firm, founded in 1978
  • Stuttgart Media University
  • His Dark Materials, a trilogy by Philip Pullman
  • Disambiguation
  • Abbreviation