计算机中，“菜单键”或称“应用进程键”（Application key），是微软Windows式计算机键盘上的一个按键。这个按键一般位于键盘右侧，在右控制键和Windows键（或位于右控制键和右转换键）之间，主要功能为通过键盘，而不是鼠标右键，弹出相关菜单。菜单键和Windows键是同时发明的，它的标志是一个鼠标光标悬停在其上方的菜单。

一些Windows公共终端机为防止用户使用右击功能，因此不在键盘上设菜单键。然而在许多Windows应用进程中，通过快捷键⇧ Shift+F10或Ctrl+⇧ Shift+F10，亦可唤起相似的功能。

In computing, the menu key or application key (≣ Menu) is a key found on Microsoft Windows-oriented computer keyboards, introduced at the same time as the Windows logo key. Its symbol is usually a small icon depicting a pointer hovering above a menu, and it is typically found on the right side of the keyboard between the right Windows logo key and the right control key (or between the right alt key and the right control key). While the Windows key is present on the vast majority of keyboards intended for use with the Windows operating system, the menu key is frequently omitted in the interest of space, particularly on portable and laptop keyboards.