Abstract numbers

Dia is a GTK+ based, Open Source cross-platform diagramming program. It is very powerful, easy to use, and free of charge. To begin using Dia, you first need to download the program and install it. If you are using Microsoft Windows you can download the windows installer here. If you are using Linux, you download it from the repository that you no...
Found on http://en.wikipedia.org/wiki/Abstract_numbers
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