- ACE - Access Control Entry - Part of an ACL which specifies a users access to specific objects.
- ACL - Access Control List is a database of permissions for an object or file which determines who can access an object and how much access is allowed.
- AD - Active Directory
- API - Application programming interface
- APM - Advanced Power Management for mobile computers.
- ATM - Asynchronout Transfer Mode.
- BDC - Backup Domain Controller provides failure backup for a PDC and keeps the replicated SAM database.
- BINL - Boot Information Negociation Layer is used to be sure the installation using RIS is being done on the correct computer.
- CD - Compact disk.
- CDFS - Compact Disk File System supports compact disks (CDs).
- Child domain - Domain below another in a domain tree. Example: "child.parent.root.com".
- DACL - Discretionary Access Control List - Contains security principle SIDS that have permission for an object.
- DDNS- Dynamic Domain Name Service allows for Dynamic updates to DNS information.
- DFS - Distributed file system allows administrators to make shares on several different servers appear to be on one share on one server..
- DN - Distinguished Name is a RDN with the location of the object in Active Directory.
- DNS - Domain Name Ssystem is a service and database used to convert between human readable names and IP addresses of computers.
- Domain - A domain is used to manage a large group of computers. It is used to control resource access for users. The term domain as used with Windows systems is not the same as an internet domain as used with DNS.
- Domain tree - A hierarchial group of one or more domains with one root domain
- DOS - Disk Operating System is the original system used when IBM variety personal computers were introduced around 1980.
- DVD - Digital Video Disks.
- Explicit trust - A trust that an administrator creates.
- EFS - Encrypting File System supports file encryption.
- FAT32 filesystem - A file allocation table operating system that supports larger disk partition size than older FAT filesystems. It uses 32 bits to point to clusters rather than 16 or 24 bits.
- Forest - The set of all domains in an organization's network.
- FQDN - Fully Qualified Domain Name used on the internet such as "myserver.myorganization.org". The maximum length is 63 characters.
- FRS - File replication service (FRS) is used to replicate the SYSVOL share.
- FSMO - Flexible Single Master Operations are operations that are done on a domain which can only be done on a single controller.
- GCS - Global catalog server.
- Global Catalog - A searchable master index with data about all objects in a forest. When the first domain controller in the forest is established, a default catalog is created automatically on that controller.
- GPO - Group policy object.
- GUID - Globally Unique Identifier which is a 128 bit number.
- HAL - Hardware abstraction layer.
- HCL - Hardware Compatibility List is a list of hardware that is compatible with Windows NT and Windows 2000.
- HPFS - High Performance File System used with older Windows NT and OS/2 operating systems.
- IE - Internet Explorer is the web browser from Microsoft.
- IIS - Internet Information Server.