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Communications of the ACM

Table of Contents

Letters to the editor: a letter to the president of ACM

Soviet Computer Technology--1959

A note on the use of the Abacus in number conversion

Conversion of integers in both directions between the base ten and any desired base can be accomplished with remarkable simplicity by use of the abacus. In fact, the conversion procedures are far more cumbersome on the electric …

The execute operations—a fourth mode of instruction sequencing

An algorithm defining ALGOL assignment statements

It is not possible, by testing symbol pairs only [2], to determine whether a given symbol string is consistent with the formation rules of ALGOL [1]. For example, the formula l1: l2: x[i := 5j + 3.14.159; violates four distinct …

Numerical inversion of Laplace transforms

Algorithms: bisection routine