Starting Approximations for Square Root Calculation on IBM System/360 Several starting approximations for square root calculation by Newton's method are presented in a form to facilitate their use in IBM System/360 square root routines. These approximations include several for the range [1/16, 1], which is the interval of primary interest on IBM System/360. CACM April, 1966 Fike, C. T. CA660409 JB March 3, 1978 10:32 AM 1015 4 1440 1346 4 1440 1440 4 1440 1440 4 1440 1645 4 1440 1932 4 1440 2159 4 1440 951 4 1440 962 5 1440 1440 5 1440 1440 5 1440 1440 5 1440 1566 5 1440 532 5 1440 1440 6 1440