# December 1964 - Vol. 7 No. 12

## Features

Mechanization of tedious algebra—the e coefficients of theoretical chemistry

Relative effects of central processor and input-output speeds upon throughput on the large computer

Double-precision square root for the CDC-3600

Limited bit manipulation using FORTRAN II

Mark sense and port-a-punch programming inputs

Method for partial rewriting of magnetic tape

A class of matrices to test inversion procedures

A note on the calculation of probabilities in an F-distribution

Another use of FORTRAN II chaining

Rational Chebyshev approximations to the Bessel function integrals Kis(x)

Parallel methods for integrating ordinary differential equations

Integer and signed constants in ALGOL