https://twetch.app/t/91c88e4f4d05db5bdbf2ff92b4837e5eb0026f…

https://twetch.app/t/91c88e4f4d05db5bdbf2ff92b4837e5eb0026f3d43b02df467aa56014bb9239b As late as December 2013, there were 25 such Bulletin Board Systems in operation, reachable via the Telnet protocol.