Hamburger button

The icon was originally designed by Norm Cox as part of the user interface for the Xerox Star personal computer, introduced in 1981.

[2] Cox described the icon's creation, saying, "Its graphic design was meant to be very 'road sign' simple, functionally memorable, and mimic the look of the resulting displayed menu list.

[4] It was short-lived, however, as the hamburger icon disappeared in Windows 2.0 in favor of a single horizontal line denoting the control menu.

[7][12] To further reduce screen it may be narrowed to three vertically stacked dots (⋮), this has been called a kebab, meatball or falafel button, but still pops up a normal-looking menu.

[14] It has been argued that while the collapsed menu button is now commonplace, its functionality is not necessarily immediately obvious when first encountered;[15] in particular, older users less familiar with modern iconography may find it confusing.