Chemical Program (IMAGE) University of Washington Caption An example of a chemical program. Here, A, B and C are different chemical species. Credit Yan Liang, <a target="_blank" href="http://www.L2XY2.com">L2XY2.com</a> Usage Restrictions Photo credit required. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.