ACM

Walter M. Carlson
Pages 174-175

ACM forum: letters

Robert L. Ashenhurst
Pages 176-177

From Washington: the government as a markter of trade information

Rosalie Steier
Page 179

Programming pearls: the back of the envelope

Jon Bentley
Pages 180-184

Should congress provide special tax incentives for firms donating computers to schools?

Gene Dallaire
Pages 185-es

The best way to put computers into schools today

Fortney H. Stark
Pages 186-187

Tax incentives for computer donors is a bad idea

Hal Berghel
Pages 188-192

Congressman Stark and Professor Berghel were given the opportunity to respond to each other's viewpoints

Fortney H. Stark, Hal Berghel
Pages 192-194

Preparing precollege teachers for the computer age

Jean B. Rogers, David G. Moursund, Gerald L. Engel
Pages 195-200

Conversing with management information systems in a natural language

Robert W. Blanning
Pages 201-207

ACM's visit to the People's Republic of China

Thomas A. D'Auria, Franklin F. Kuo, Dora Kuo
Pages 208-214

Cobol vs. PL/1: some performance comparisons

Paul J. Jalics
Pages 216-221

The software lookaside buffler reduces search overhead with linked lists

Gerald Bozman
Pages 222-227

Efficient nesting of congruent convex figures

Dov Dori, Moshe Ben-Bassat
Pages 228-235

A fast parallel algorithm for thinning digital patterns

T. Y. Zhang, C. Y. Suen
Pages 236-239

Optimal pagination of B-trees with variable-length items

George Diehr, Bruce Faaland
Pages 241-247

Comment on Quad- and Octtrees

Markku Tamminen
Pages 248-249

Communications of the ACM

Table of Contents

Special message: intersociety cooperation