maintenance service - Computer Definition A service provided to keep a product in good operating condition. One of the strong selling points for the rise of software as a service (SaaS) was that all program maintenance is provided by the vendor of the application. See SaaS.
For the former trade union, see Amalgamated Society of Painters and Decorators. Antisocial personality disorder (ASPD), also known as dissocial personality disorder (DPD) and sociopathy, is a personality disorder, characterized by a pervasive pattern of disregard for, or violation of, the rights of others.
The current approach to defining sociopathy and the related concepts is to use a list of criteria. The first such list was developed by Hervey Cleckley (1941), who is known as the first person to describe the condition in detail. Anyone fitting enough of these criteria counts as a psychopath or sociopath. There are several such lists in use. The most commonly used is called the Psychopathy Checklist Revised (PCL-R), developed by Robert Hare and his colleagues.