1)i/o conversion,输入输出数据型转换2)input data translator,输入数据转换器3)input / output exchange data communication,输入输出交换数据通信4)data communication input / output exchange,数据通信输入输出交换5)DO/IT (digital output/input translator),数字输出-输入转换器6)transformation of computing result,输出输入的转换
