In AS／400, the function of the operating system 3270 device emulation support that converts 3270 data streams intended for a 3278 display station into data streams that can be recognized by a display station attached to the AS／400 system.; 在AS／400系统中,一种OS／400 3270设备仿真支持程序中的操作程序,把本为3278显示 站准备的3270数据流转换成“接在AS／400系统上的显示站能够识别的”数据流。