See also:

• Computers: Internet: Protocols: LDAP  (42)
• Computers: Security: Public Key Infrastructure: X.509  (2)

• eTrust Directory - An industry's leading solution for large-scale, business-critical directory service applications.
• NEXOR Directory - High Performance X.500/LDAP directory server build on top of an OO database and a WWW based management interface.
• Solstice X.500 Directory Products - They enable companies to build a standards-based, distributed directory that offers a common storage space for data regarding people and resources.