Symbol 6089 from IEC 60417 - Title/Meaning: Menu invocation key 
Function/description: To identify the control to invoke a function (preferably displaying a menu), depending of the currently active software.
Own work using: iso.org/obp/graphics/grs/08c11d18-ec62-4672-9635-f09c9c51b1bf 200.png
Vectorization:  Mrmw