英文：A low-speed input device that converts graphic and pictorial data into binary, numeric inputs for a digital computer.
中文：一種低速輸入設備，它将圖形和圖象數據轉換成用于數字計算機的二進制數值輸入。
英文：For analog inputs, any absolute voltage value above which the analog-to- digital converter cannot distinguish a change. The overload value can be different for plus and minus inputs.
英文：An electrical gate or mechanical device which implements the logical OR operator. An output signal occurs whenever there are one or more inputs on a multichannel input. An OR gate performs the function of the logical "inclusive OR operation" .
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