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Communications of the ACM

Table of Contents

A letter from the ACM president: whither our chapters?

Program development by stepwise refinement

Key-to-address transform techniques: a fundamental performance study on large existing formatted files

Dynamic microprogramming: processor organization and programming

Animator: an on-line two-dimensional film animation system

On complement division

Algorithm 408: a sparse matrix package (part I) [F4]

Software and patents: a status report

Patents and programs: the ACM's position