Byte Information Exchange
BYTE Information eXchange (BIX) was an online service created by BYTE. == History == BYTE in the October 1984 issue announced BYTEnet, "a project in computer conferencing", with 200 beta testers who received free service during the "experiment". The magazine formally announced BIX in the June 1985 issue, offering an introductory sign-up fee of $25, and evening and weekend charges of $6 per hour of connect time: the service offered direct numbers in San Francisco, Los Angeles, Chicago, and Boston.
Source: Wikipedia — Byte Information Exchange (CC BY-SA 4.0)