O
objectCenter
objectType
objectTypeUI
objExists
offsetCurve
offsetCurveOnSurface
offsetSurface
ogs
ogsRender
openGLExtension
openMayaPref
optionMenu
optionMenuGrp
optionVar
orbit
orbitCtx
orientConstraint
outlinerEditor
outlinerPanel
overrideModifier
indicates a Python script
indicates a Python script