H

hardenPointCurve
hardware
hardwareRenderPanel
hasMetadata
headsUpDisplay
headsUpMessage
help
helpLine
hermite
HfAddAttractorToAS 
HfAssignAS 
HfBuildEqualMap 
HfBuildFurFiles 
HfBuildFurImages 
HfCancelAFR 
HfConnectASToHF 
HfCreateAttractor 
HfDeleteAS 
HfEditAS 
HfPerformCreateAS 
HfRemoveAttractorFromAS 
HfSelectAttached 
HfSelectAttractors 
HfUnassignAS 
hide
hikGlobals
hilite
hitTest
hotBox
hotkey
hotkeyCheck
hsv_to_rgb
hudButton
hudSlider
hudSliderButton
hwReflectionMap
hwRender
hwRenderLoad
hyperGraph
hyperPanel
hyperShade
hypot

indicates a MEL script