An object such as a user or group that is present on an access control list.
A list of security permissions applied to an object. An ACL for an item normally includes membership (ACEs) and the actions that each member can perform on the item.
The Microsoft Windows directory service, which replaced the Security Accounts Manager in Microsoft Windows NT 4. Active Directory consists of a forest, one or more domains, organizational units, containers, and objects. Various classes of objects can be represented within Active Directory, including users, groups, computers, printers, and applications.