一种信息代码，用特殊的图形来表示数字、字母信息和某些符号。

由一组宽度不等的黑条和空白按一定的编码规则组合起来，用以表示一个完整数据的符号 。-An information code, with special graphics to represent numbers, letters, information, and some symbols. By a group of black bars of varying width and blank according to a certain coding rules combine to represent a complete data symbols.