source https://github.com/RubikIdeaCom/RICalcNSCDB Simple Calculator by PHP using NO Session or Cookie or DB
version 1.0.0
author RubikIdea.com (Ali Seyedabadi) info@rubikidea.com
link https://www.linkedin.com/in/ali-seyedabadi/
copyright 2009 rubikidea.com
license MIT