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Windows logo key (also known as Windows key, start key, logo key, flag key, super key, command key or flag, home) is a keyboard key which was originally introduced on the Microsoft Natural keyboard before the release of Windows 95. This key became a standard key on PC keyboards. Tapping this key invokes the operating system's start menu, if it has one. In Windows, performs the same function, in case the keyboard lacks this key. Historically, the addition of two Windows keys and a menu key marked the change from the 101/102-key to 104/105-key layout for PC keyboards:〔Initially, 104-key keyboards were frequently called "Windows keyboards" but this denomination has become less and less used with time.〕 compared to the former layout, a Windows key was placed between the left and the left ; another Windows key and—immediately to its right—a menu key were placed between the (or right key on keyboards that lack ) and the right control key. In laptop and other compact keyboards it is common to have just one Windows key (usually on the left). Also, on Microsoft's Entertainment Desktop sets (designed for Windows Vista), the Windows key is in the middle of the keyboard, below all other keys (where the user's thumbs rest). On Windows 8 tablet computers, hardware certification requirements initially mandated that the Windows key is centered on the bezel below the screen, except on a convertible laptop, where the button is allowed to be off-center in a tablet configuration. This requirement was relaxed in Windows 8.1, allowing the Windows key to be placed on any bezel or edge of the unit, though a centered location along the bottom bezel is still preferred. ==Licensing== Microsoft regulates the appearance of the Windows key logo picture with a specially crafted license for keyboard manufacturers ("Microsoft Windows Logo Key Logo License Agreement for Keyboard Manufacturers"). With the introduction of a new Microsoft Windows logo, first used with Windows XP, the agreement was updated to require that the new design be adopted for all keyboards manufactured after September 1, 2003.〔(Amendment to the Windows Key Logo License Agreement ) (page no longer accessible)〕 However, with the release of Windows Vista, Microsoft published guidelines for a new Windows Logo key that incorporates the Windows logo recessed in a chamfered lowered circle with a contrast ratio of at least 3:1 with respect to background that the key is applied to.〔(Windows Vista Hardware Start Button )〕 In Common Building Block Keyboard Specification, all CBB compliant keyboards were to comply with the Windows Vista Hardware Start Button specification beginning in 2007-06-01. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「windows key」の詳細全文を読む スポンサード リンク
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