Hennessy and Patterson, circa 1990 (IMAGE) Association for Computing Machinery Caption This is John Hennessy and David Patterson circa 1990 with the publication of their textbook 'Computer Architecture: A Quantitative Approach'. Credit Shane Harvey Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.