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McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
1. Abbr. for “air-dried.”
2. Abbr. for access door.
3. Abbr. for area drain.
4. Abbr. for “as drawn.”
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
The country code for Andorra.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
Active DirectoryAn advanced, hierarchical network directory service that comes with Windows servers and used for managing permissions and user access to network resources. Introduced in Windows 2000, Active Directory is a domain-based network that is structured like the Internet's Domain Naming System (DNS). Using the LDAP directory access protocol, a company's workgroups (departments, sections, offices, etc.) are assigned domain names similar to Web addresses, and any LDAP-compliant Windows, Mac, Unix or Linux client can access them.
Active Directory can function in a heterogeneous, enterprise network and encompass other directories including NDS and NIS+. Cisco supports Active Directory in its IOS router operating system. See domain-based network, LDAP, forests and trees, Internet domain name, ADSI and network directory.
banner adA graphic image used on websites to advertise a product or service. Banner ads, or simply "banners," are rectangles typically 468 pixels wide by 60 pixels high. They also come in other common sizes, including 460x60, 460x55 and 392x72. A much larger horizontal ad image called the "leaderboard" is 728x90, while "skyscraper ads" are narrow and vertically oriented, typically 120x600 and 160x600. See trick banner, dynamic rotation, interstitial ad, Shoshkele, SUPERSTITIAL, meta ad and impression.
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