Calculating Machines and Computers, by Geoffrey Tweedale. 32 Pages. Softbound. The invention of the computer was one of the great intellectual achievements of the 20th century - practically everyone today owns a home computer, and doesn't know where we would be without it. But what most don't know is that its origins go way back. This book explores the complete historical development of computing. It describes man's earliest attempts at calculating machinery like the abacus, discusses the work and machines of the great pioneers, explores the revolution of computing today, and much more. The many early black & white photos and illustrations depict the full range of computing machines from hand calculators, to the "supercomputer", to today's modern computer. This book is a must for anyone interested in technology, mathematics, or just wanting to know the history behind this great invention. UNAVAILABLE (BK-0891)