Hi Pedro
Here is some English info on Wersi http://www.4shared.com/file/28662846/503c24d0/Wersi_Open_Art_System.html

You can also visit my website at www.wersiabacus.plus.com

If it helps, I originally used hardware and then moved over to software; however since having the Wersi Abacus, I would not go back to either.

Bill