HDO

AcronymDefinition
HDOHigh Definition Optics (various companies)
HDOHealth Delivery Organization (various organizations)
HDOHigh Density Overlay (phenolic resin-impregnated plywood used in concrete forms)
HDOHuman Development Organization (Sri Lanka)
HDOHoly Day of Obligation
HDOHearing Designation Order (FCC proceedings)
HDOHealthcare Discount Organization (Addvantage Care)
HDOHeavy Duty Oil
HDOHigh Demand Occupation
HDOHumanitarian Demining Operation
HDOHydrogen Deuterium Oxide
HDOHeadache During Orgasm
HDOHomeland Defense Office
HDOHousing Development Office