Can someone help me identify this IBM machine?

[Bob Bradlee]

On Sun, 22 Feb 2009 17:56:37 -0800, Marcin Wichary wrote:

>I spent 20 minutes on Google without much luck:
>http://www.flickr.com/photos/mwichary/3300685689/

>It seems like a calculator.

>Thanks in advance!

>-- 
>Marcin Wichary
>Sr. user experience designer, Google
>Graphical User Interface gallery >> www.guidebookgallery.org

http://www.bitsavers.org/pdf/ibm/610/23-6335-0_610_Manual_Of_Operation_Aug57.pdf

Goes into great detail about the operation.

Bob