LDAP
Definition
Lightweight Directory Access Protocol, an Internet protocol that programs use to look up information from a server.
LDAP is an Internet protocol that email and other programs use to look up information from a server. The LDAP protocol is both cross-platform and standards-based, so applications should not need to worry about the type of server hosting the directory.
MIT Touchstone uses the MIT LDAP server as a source of information about MIT users when the MIT IdP communicates with various SP's