Your Internet Consultant - The FAQs of Life Online
Other non-TCP/IP networks are also linked to the Internet using a hodgepodge of gateways, but more commonly, the sites on BITNET and other networks that don't do TCP/IP are switching to networks with capabilities of talking in the TCP/IP language so that they can fully utilize the resources of the Internet. BITNET seems to have peaked in terms of its popularity and use; its numbers of sites and users is declining as sites manage to connect directly to the Internet.