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What does HFO stand for?

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Rank Abbr.Meaning
HFOHeavy Fuel Oil
HFOHaas Factory Outlet (machine tool distributor; Twinsburg, OH)
HFOHigh Frequency Oscillator
HFOHole Full of Oil (oil exploration slang)
HFOHydrofluoro-Olefin (refrigerant)
HFOHealth Force Ontario (Canada)
HFOHonolulu Forecast Office (National Weather Service; Hawaii)
HFOHeavy Furnace Oil

Note: We have 37 other definitions for HFO in our Acronym Attic