128碼開始於1981年推出，是一種長度可變、連續性的字母數字條碼。與其他一維條碼比較起來，128碼是較為複雜的條碼系統，而其所能支援的字元也相對地比其他一維條碼來得多，又有不同的編碼方式可供交互運用，因此其應用彈性也較大。-128 yards began in 1981 introduced a variable length, continuous digit alphanumeric bar code. With other one-dimensional bar code comparison, the 128 yards is a more complex barcode system, while the character can support relative to the other one-dimensional bar code to much because of different encoding methods for interactive use, its application will have greater flexibility.