The 29th World Science Fiction Convention (Worldcon), also known as Noreascon I, was held on 2âÂÂ6 September 1971 at the Sheraton-Boston Hotel in Boston, Massachusetts, United States.
The chairman was Tony Lewis.
Attendance was approximately 1,600.
The convention is mentioned in the preface to The Ringworld Engineers for the MIT students who pointed out that the Ringworld would be unstable.