Tymnet
article-link
What links here
X.400
Microsoft Exchange Server
article-link
MAPI
article-link
Value-added network
article-link
Email address
article-link
Microsoft Outlook
article-link
Application layer
article-link
Standardization agreement
article-link
John F. Sowa
article-link
ASN.1
article-link
X.500
article-link
Remote Operations Service Element protocol
article-link
OSI model
article-link
Internet protocol suite
article-link
Harald Tveit Alvestrand
article-link
article-link