jargon.artrocity.com
New Hacker's Dictionary the Jargon File v 4.4.6
Pejorative hackerism for “token-ring network”, an early and very slow LAN technology from IBM that lost the standards war to Ethernet. Though token-ring survives in a few niche markets (such as factory automation) that put a high premium on resistance to electrical noise, the term is now (2000) primarily historical.