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電話的按鍵布局是怎么來的？
[ 2006-12-18 10:35 ]
不知您有沒有仔細(xì)觀察過我們天天使用的電話：它的按鍵排列，0是在最下方的。不是應(yīng)該越小的數(shù)字越應(yīng)該排在前面嗎？為什么電話的按鍵布局這么特別呢？下面這篇文章就將為您解釋這個問題。
 Mechanical adding machines, based on rotating wheels, always have the 0 buttonadjacentto the 1 button. By convention, most old adding machines had the numbers increasing in value from the bottom. When the numbers were put onto a pad arranged as a 3 by 3 grid with one left over, the order of the numbers was kept the same.
On a rotary telephone dial, the 0 comes adjacent to the 9 because a 0 in the telephone number is signaled by 10 pulses on the line. When telephones acquired push buttons in a grid, the ordering of the buttons was carried over from the old telephone dial.
adjacent: 鄰近的
（英語點津 Annabel 編輯）
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