> I will call the use of this philosophy of design the ``MIT approach.'' Common Lisp (with CLOS) and Scheme represent the MIT approach to design and implementation.

and the New Jersey approach:

> Early Unix and C are examples of the use of this school of design, and I will call the use of this design strategy the ``New Jersey approach.''

(Unix came out of Bell Labs, which is in Murray Hill, New Jersey.)

When the anonymized Bill Joy is introduced, it is written that he is "from Berkeley (but working on Unix)". That parenthetical is important because it establishes him as working under the New Jersey approach (and possibly working with people in New Jersey), and therefore as being a "New Jersey guy", despite not physically being located there.