There were formal sessions at Kresge Auditorium with speeches.

Kresge Auditorium on the MIT campus

There were snacks and people to meet in the halls:

Here is the main auditorium filling up:

View of stage before event Tuesday morning

Looking back as the audience comes in

There were giveaways on the seats. T-shirt, book, tote-bag to hold them, etc.:

T-shirt, tote-bag, book

Bob Metcalfe presided:

Bob Metcalfe opening the sessions

Then there were speeches:

View from the back during a speech

Side view of same scene

One striking feature of the auditorium is the pipe organ:

Bob Metcalfe presiding, with pipe organ to his side