The source is easy to recognize--and I'm surprised that more folks
didn't recognize it--IBM QUICKTRAN. It took quite a bit of digging
just to find a reference on the web, however:
http://www.sciencemag.org/cgi/issue_pdf/frontmatter_pdf/149/3683.pdf
The article (page 497) appears to be the source of your T-shirt.
Cheers,
Chuck