Meet the 69-year-old professor who left retirement to help lead one of Google's most crucial projectsProfessor David Patterson retired from U.C. Berkeley last summer after a 40-year academic career in computer architecture.He's now a key part of the team behind a critical chip that Google uses for artificial intelligence processing.Without this chip, Google top execs estimated it would have had to double its data centers to support even a limited amount of voice processing. A year ago the Univers
