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| Subject | Czech | English |
| comp., MS | aktivní okno | active window (The window in which a user is currently working or directing input. An active window is typically at the top of the Z order and is distinguished by the color of its title bar) |
| comp., MS | okno aktivního dokumentu | active document window (In an environment capable of displaying multiple on-screen windows, the window containing the document that will be affected by current cursor movements, commands, and text entry) |