Is there any physical meaning of the image on Feynman's T-shirt?
Surely there is a story behind the print on Feynman's tee, these are the CM-1/CM-2 T-shirts. Quoting Tamiko Thiel:
The geometric boxes and their 'hard' connections represent the 12-dimensional 'cube of cubes' that forms the internal hardware network connecting all processor chips with each other in a maximum of 12 steps. Feynman is the one who suggested this structure, and I played with the topology until I came up with this representation, which can be expanded for an infinite number of dimensions.
They were also a part of Jobs's think different campaign.