Windows key - Wikipedia
https://en.wikipedia.org/wiki/Windows_keyThe Windows logo key (also known as Windows-, win-, start-, logo-, flag-, or super-key) is a keyboard key which was originally introduced on the Microsoft Natural keyboard in 1994. This key became a standard key on PC keyboards.In Windows tapping the key brings up the start menu. Ctrl+Esc performs the same function, in case the keyboard lacks this key.