August 13, 2013: While this site is interesting,
my latest works are listed here: http://t.co/bn717DlSXU

The Stephenson Abacus™, Site Map.

by Steve Stephenson
Revised April 24, 2008 (copyright)

Introduction (The Third Paper)

Ancient Scientific Calculators (The First Paper)

Base-60 Multiplication Example

An Ancient Base-60 Calculator? (The Second Paper)

References with Quotes and Notes. Some of the interesting stuff here is:

Tools


2006-2008 Stephen Kent Stephenson. Some Rights Reserved. Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.

sks23cu AT gmail