Lesson One Early Robots 1
Lesson Two What Is A Computer? 16
Lesson Three What Is Hardware and What Is Soft-ware? 35
Lesson Four Input:Taking In Information 51
Lesson Five Output:Presenting the Results 69
Lesson Six Computers Helping at School 86
Lesson Seven Computers in Libraries 101
Lesson Eight Computer and Telephone 118
Lesson Nine Computerized Traffic Control 133
Lesson Ten Treating Disabilities 148
Lesson Eleven Nature of an Operating System 164
Lesson Twelve Making DOS Do Something 179
Lesson Thirteen The Database 196
Lesson Fourteen Early Developments of Computatio-nal Devices 212
Lesson Fifteen Computer Capabilities and Limita-tions 227
Lesson Sixteen The 20-volume Oxford Dictionary Will Now Fit into Your Pocket 246
Appendixes Ⅰ．Word Formation 262
Ⅱ．Reading Materials 273
Vocabulary 291