Patrick Logan posted some pointers to information about T, including a project to revive that fine implementation of Scheme.

The summer after I graduated from high school, I was fortunate to work at Burroughs' System Development Corporation subsidiary, which did some defense work, and some research. I was working on building a compiler for the functional language Super, which was a derivative of SASL. This was the first time that I saw a functional language (we were doing combinator graph reduction), and the first time that I saw a language where indentation was part of the syntax -- they called in the offside rule. Python had not yet been born, but I suppose it's some strange circle of life that I'm once again working in a language with an offside rule.

Lots of important Lisp and Scheme related research came out of the T project, so I'm glad to see it get a little more time in the sun.