Just read a nice article about the icon frequently used to present a menu (
) – and whether a “hidden” menu is appropriate – it isn’t.
https://lmjabreu.com/post/why-and-how-to-avoid-hamburger-menus/
By the way, I just went after who and why and when find it out: it was a guy at xerox – you know the company found out the graphic interface for computers – was applied by apple – and stolen by windows….