Directory-service. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/directory-service
directory service - Computer Definition
A database that is queried more often than it is updated. Directories tend to be lists of data that may occasionally change but are queried constantly, such as resources in a network (see network directory), contact lists and business directories (Yellow Pages, etc.). See X.500 and LDAP.