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What does HLO stand for?

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Rank Abbr.Meaning
HLOHelicopter Landing Officer (offshore oil and gas industry)
HLOHigh Level Outcome (various organizations)
HLOHigh Lunar Orbit
HLOHelicobacter-Like Organism
HLOHot-line Operator
HLOHispanic Latino Outreach (Brady Center to Prevent Gun Violence; Los Angeles-based program)

Note: We have 22 other definitions for HLO in our Acronym Attic