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What does H/O stand for?

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Rank Abbr.Meaning
H/OHistory Of
H/OHistory of (medical charting)
HOHigh Output
HOHead Office
HOHonduras (Swan Islands)
HOHome Office
H/OHome Owner
HOHolstein (cattle breed)
HOHomeowners (multiple line insurance policy covering both property and liability for homeowners)
H/OHigh Output
HOHigh Order
H/OHead Office
HOHold On
HOHold Off
HOHonest Opinion
HOHoger Onderwijs (Dutch)
HOHand Off
H/OHold On
HOHammer On (guitar technique)
H/OHome Office
HOHide Out
H/OHand Over
H/OHang On
HOHearing Officer
HOHeavy Oil
HOHippocratic Oath
HOHydrographic Office
HOHouse Officer
HOHistory Office
HOHarmonic Oscillator
HOHeadquarters Office
HOHeterotopic Ossification (orthopedics)
HOHostilities Only
H/OHalf Ounce
HOHearing Office (Social Security)
HOHinder Ordonnantie (Indonesian: Hinder Ordinance)
HOHandelsorganisation (GDR trade organization)
H/OHurst/Olds (high-performance automobiles)
HOHumanitarian Operation
HOHeavy Offense (gaming)
HOHand Orthosis
HOHurst Olds (automobile)
HOHospitalisation d'Office (French)
HOHardware Overhead
HOHip Orthosis
HOHip Opener (stretching exercise)
HOHierorts (Austrian German: local or locally)
HOHalf O Scale
HOHeight Obstacle
HOHorizontal Overscan
H/OHightest Offer

Note: We have 13 other definitions for H/O in our Acronym Attic