PAGE
Foreword 1
Types of Ancient and Modern Machines 5
The Early Key-Driven Art 17
The Key-Driven Calculator 50
Early Efforts in the Recording Machine Art 79
First Practical Recorders 111
Introduction of the Modern Accounting Machine 144
The High-Speed Calculator 149
The Improved Recorder 163
The Bookkeeping and Billing Machine 174
A Closing Word 190