"If you look at the development of software in Tucson, there's a lot more jobs involved now than are directly in optics," said Tim Yopp, president of the center and Palo Verde Software."And Tucson is known as Optics Valley." For instance, Breault Research creates software for optics companies and Yopp's company specializes in medical testing software. Copyright Tucson Citizen, March 20, 1995. All rights reserved.