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A keyboard layout is any specific ''mechanical'', ''visual'', or ''functional'' arrangement of the keys, legends, or key-meaning associations (respectively) of a computer, typewriter, or other typographic keyboard. ; Mechanical layout: The placements and ''keys'' of a keyboard. ; Visual layout: The arrangement of the ''legends'' (labels, markings, engravings) that appear on the keys of a keyboard. ; Functional layout: The arrangement of the ''key-meaning associations'', determined in software, of all the keys of a keyboard. Most computer keyboards are designed to send scancodes to the operating system, rather than directly sending characters. From there, the series of scancodes is converted into a character stream by keyboard layout software. This allows a physical keyboard to be dynamically mapped to any number of layouts without switching hardware components – merely by changing the software that interprets the keystrokes. It is usually possible for an advanced user to change keyboard operation, and third-party software is available to modify or extend keyboard functionality. == Key types == A computer keyboard comprises ''alphanumeric'' or ''character keys'' for typing, ''modifier keys'' for altering the functions of other keys, ''navigation keys'' for moving the text cursor on the screen, ''function keys'' and ''system command keys'' – such as and – for special actions, and often a ''numeric keypad'' to facilitate calculations. There is some variation between different keyboard models in the mechanical layout – i.e., how many keys there are and how they are positioned on the keyboard. However, differences between national layouts are mostly due to different selections and placements of symbols on the character keys. 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「keyboard layout」の詳細全文を読む スポンサード リンク
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