In 1988? Just stick random semicolons in things.

Account "guest" with no password was provided by default back then, to help others do some work remotely, debug connection issues, or chat with admins.

> Would be cool if he adds a session on how to hack distributed system in 1988..

username: field

password: technician

Honestly, there was not very much security back in those days. So much relied on trusting the Internet "community" not to abuse.