Correction to Economies of Scale and the IBM System/360 On page 439, a "typical" instruction mix id discussed and the timing computed as outlined in that page. Through an undetected programming error, the times and the resulting regression equation are slightly in error. CACM February, 1967 Solomon, M. CA670214 ES March 17, 1982 10:10 AM 2387 5 3190 3190 5 3190 3190 5 3190 3190 5 3190 1417 6 3190 3190 6 3190