LDAP, Lightweight Directory Access Protocol

The Lightweight Directory Access Protocol (LDAP) (pronounced /ˈɛldæp/) is an application protocol for querying and modifying data of directory services implemented in Internet Protocol (IP) networks.


http://en.wikipedia.org/wiki/LDAP

OpenLDAP Software is an open source implementation of the Lightweight Directory Access Protocol.

The suite includes: slapd - stand-alone LDAP daemon (server) libraries implementing the LDAP protocol, and utilities, tools, and sample clients.

http://www.openldap.org/