本标准规定了用于主机系统与主机系统之间通信的AT Attachment命令集 存储设备。这为系统制造商、系统集成商、， 软件供应商和存储设备供应商。AT Attachment命令集包括 由通常称为ATAPI设备的设备实现的数据包功能集。本标准保持 与AT附件8-ATA/ATAPI命令集（ATA8-ACS）高度兼容（参见 ANSI INCITS 453-2008）。

This standard specifies the AT Attachment command set used to communicate between host systems and storage devices. This provides a common command set for systems manufacturers, system integrators, software suppliers, and suppliers of storage devices. The AT Attachment command set includes the PACKET feature set implemented by devices commonly known as ATAPI devices. This standard maintains a high degree of compatibility with the AT Attachment 8 - ATA/ATAPI Command Set (ATA8-ACS) (see ANSI INCITS 453-2008).