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Abbreviation	Definition
HIPM	Host-Initiated link Power Management
HIPO	Hierarchical Input/Process Output
HIPPS	Highly Integrated Pluto Payload System
HIRad	Hurricane Imaging Radiometer
HiRISE	High Resolution Imaging Science Experiment
HISAM	Hardware Initiated Standalone Memory
HISAM	Hardware Initiated Stand-Alone Memory
HIST	HISTory
HIT	Hypergravity Isolation Training
HITS	High Rate Multiplexer Input/Output Test System
HITS	HRM (High Rate Multiplexer) Input/output Test System
HIU	Headset Interface Unit
HIV	Helium Isolation Valve
HK	HouseKeeping
HL	HardLine
HL	Heel Line
HL	High Level
HL	Hinge Line
HL	Hydrogen Line
HLA	Heavy Lift Aircraft

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