本美国国家标准旨在为盒式磁带中0.250英寸（6.30毫米）宽的4磁道磁带提供格式和记录标准，用于信息处理系统、通信系统和相关设备之间的信息交换，使用交换双方商定的信息交换标准代码。本标准仅适用于在0.250英寸（6.30毫米）盒式磁带上录音，并补充了美国国家标准ANSI X3。127

This American National Standard is intended to provide a format and recording standard for a 0.250-inch (6.30-mm) wide, 4-track magnetic tape in a cartridge to be used for information interchange between information processing systems, communications systems, and associated equipment utilizing a standard code for information interchange, as agreed upon by the interchange parties. This standard refers solely to recording on 0.250-inch (6.30 mm) magnetic tape cartridge and complements American National Standard, ANSI X3.127.