Hi, Apologies if somebody posted this earlier - it's hard to keep track of what's been covered & what's not, sometimes. There are a couple of interesting articles in the Spring 1999 issue of "American heritage of Invention & Technology" magazine, published by Forbes. A short article in the "Notes from the Field" section is about the replica being created at Iowa State University of the "Atanasoff-Berry Computer", originally built between 1939 & 1942. There's also an extensive article about Howard Aiken and the Harvard-IBM Mark I computer. Those of you interested in really old computers may want to check this stuff out at your local library. Regards, Alex Calculator History & Technology Archive Web Page http://aknight.home.mindspring.com/calc.htm