Explore 600 years of caculating devices, from the abacus to the desk top computer, with valuable information for historians and collectors alike. With 500 color photographs, accurate captions, and a guide to current values, this will be an essential guide to collecting office machines.

"Ablaze with humor" (New York Magazine), Lupton traces the practice of marketing towards women

LIFE Magazine is the treasured photographic magazine that chronicled the 20th Century. It now lives on at LIFE.com, the largest, most amazing collection of professional photography on the internet. Users can browse, search and view photos of today’s people and events. They have free access to share, print and post images for personal use.