The Plaid Cow Solutions Software License (PCSSL) is the <a href="http://creativecommons.org/">Creative Commons</a> <a href="http://creativecommons.org/licenses/by-nd-nc/2.0/">Attribution-NonCommercial-NoDerivs 2.0</a> License with the additional restriction that copyrighted work may not be redistibuted by anyone without prior permission of the author. Permission to create derivative works (for personal use only) is also granted.