David: Yes, I am already using an interactive multimedia CBT in radiation protection. A team of people here at USC is developing this course, and I am planning to present it as a work-in-progress paper at the next HPS meeting in San Antonio, so if you are going to attend this meeting, we will have the opportunity to talk about it. Armando Zea azea@engr-serv.usc.edu azea@busaff.usc.edu