Dear friends, I'm recollecting information for an article I will write about the transition of electro-mechanical calculators to electronic calculators during the 60's. I've found that the ANITA from Sumlock Comptometer of England (1963) is usually regarded as the first electronic calculator [1]. However, recently I found an article about Heinz Nixdorf of Germany in the LEXICON's History of Computing (CD-ROM) which indicates that he built several models of electronic calculators back in 1954 (Models ES12 and ES24). I haven't been able to obtain more information on these calculators. I suppose this is because Nixdorf moved soon onto the computers technology (eventually joining with Siemens). As a reference, I posted a copy of the Nixdorf article in my web site at the following address: http://www.dotpoint.com/xnumber/chistory.htm Information about the Anita can be found at: http://www.dotpoint.com/xnumber SECTION: VINTAGE CALCULATORS --> ELECTRONIC --> ALBUM --> Anita Any information on this subject will be appreciated. Regards, James Redin ----------------------- [1] Bruce Flamm, "The World's First Electronic Calculator - Who Made It?" The International Calculator Collector - Fall 1996, Issue #14.