A Apple os chama de Botões da barra de título . Note que eles são nomeados Fechar, Minimizar e Zoom . Estes são também os nomes atribuídos na API de acessibilidade do AppleScript:
{"close button", "zoom button", "minimize button"}
Parece que a Microsoft não lhes dá um nome (mais?), como eles são sempre listados como os seguintes :
An application window includes elements such as a title bar, a menu bar, the window menu (formerly known as the system menu), the minimize button, the maximize button, the restore button, the close button, a sizing border, a client area, a horizontal scroll bar, and a vertical scroll bar. [...]
The buttons in the upper-right corner affect the size and position of the window. When you click the maximize button, the system enlarges the window to the size of the screen and positions the window, so it covers the entire desktop, minus the taskbar. At the same time, the system replaces the maximize button with the restore button. When you click the restore button, the system restores the window to its previous size and position. When you click the minimize button, the system reduces the window to the size of its taskbar button, positions the window over the taskbar button, and displays the taskbar button in its normal state. To restore the application to its previous size and position, click its taskbar button. When you click the close button, the application exits.
O glossário também não contém um termo comum para esses botões.
O pessoal do GNOME chama-os Comandos da Janela (também aqui ):
Different window commands are appropriate to different types of window. See the description of each particular window type for a list of appropriate window commands. These are the possible window commands:
Close
Closes the window. Always draw this as a button on the window border when relevant to the window type.Maximize
Causes the window to use all unused screen space.Minimize
Causes the window to be temporarily hidden. It will continue to appear on the desktop window list.Roll-up/Unroll
Shows only the title bar of the window, as if it has been "rolled up".