Jack L. Stone, who produced the daily Internet newsletter “NCPV Hotline,” died May 9 after suffering an apparent heart attack on April 29. Jack had more than 35 years of engineering experience, having received his Ph.D. in electrical engineering from the University of Texas at Austin in 1969. His tenure at the National Renewable Energy Laboratory began on July 3, 1978. He was a Principal Scientist in the National Center for Photovoltaics, serving as Project Leader for the International Market and Applications Development project. He formerly served as Division Director for NREL’s Solar Electric Research and was the Technical Director for Photovoltaics. In September 2001, Jack was honored with the 4th Paul Rappaport Award “for his outstanding leadership in the field of photovoltaics” and was elevated to senior member in the IEEE.