access control list (ACL)The list of permissions granted or denied that is attached to a file or folder.
Action CenterA new Windows 7 tool that replaces the Windows Vista Security Center. Action Center consolidates security, performance, and maintenance issues affecting your computer into a single panel that also includes information on device-related problems. In addition, Action Center provides links to obtain more information and troubleshoot any of these problems.
active partitionA partition or volume on a hard disk that has been identified as the primary partition from which the operating system is booted.
ad hoc networkA peer-to-peer wireless connection between two computers without going through an access point.