What does AD stand for?

Airworthiness Directive

A regulation issued by an aviation authority when a problem has been identified with a particular aircraft part.

Attachment Disorder

Active Directory

Active Directory A Microsoft technology, part of the Active Platform, that is designed to enable applications to find, use, and manage directory resources (for example, user names, network printers, and permissions) in a dis-tributed computing environment. Distributed environ-ments are usually heterogeneous collections of networks that often run proprietary directory services from different providers. To simplify directory-related activities associ-ated with locating and administering network users and resources, Active Directory presents applications with a single set of interfaces that eliminates the need to deal with differences between and among these proprietary ser-vices. Active Directory is a component of the Windows Open Services Architecture (WOSA). also directory service, WOSA.

Air Defence

Alzheimer'S Disease

Alzheimer's disease (AD), also known as just Alzheimer's, is a chronic neurodegenerative disease that usually starts slowly and gets worse over time. It is the cause of 60% to 70% of cases of dementia. The most common early symptom is difficulty in remembering recent events. As the disease advances, symptoms can include problems with language, disorientation (including easily getting lost), mood swings, loss of motivation, not managing self care, and behavioural issues.

Associate Degree

Absolute Deviation

The absolute deviation of an element of a data set is the absolute difference between that element and a given point. Typically the deviation is reckoned from the central value, being construed as some type of average, most often the median or sometimes the mean of the data set.

Absolute Difference

Accidenjal Discharge