A directory service is a distributed store of information about the users of a computer system and the infrastructure that supports that system.
The goal of X.500 was to cut through the babble of competing information repositories to define a single place where users from all nations could go to locate each other, learn about each other, discover common likes and dislikes, and eventually communicate freely to find a path to universal peace and brotherhood and the dawning of the Age of Aquarius. The key features of an X.500 directory service are as follows:
The information is distributed among many different servers.
Users can submit queries to any server to find information anywhere in the system.
Servers can find information on ...