Access control list Used in Solaris to provide greater control over file access permissions when traditional Unix file protection is not enough. An ACL provides better file security by enabling you to define file permissions for the file owner, file group, other specific users and groups, and default permissions for each of those categories.
ARP (Address Resolution Protocol) The Internet protocol that dynamically maps Internet addresses to physical (hardware) addresses on local area networks. ARP is limited to networks that support hardware broadcast.
Array Controller A storage array
AutoClient A client system type that caches (locally stores copies of data as it is referenced) all its needed system software from a server. ...