Cool Stars 14 - Submitted Abstract # 54 This version created on 05 October 2006 Cool Star Science and Atomic Data Needs Nancy S. Brickhouse, Harvard-Smithsonian Center for Astrophysics Cool star science -- ranging from searches for extrasolar planets to X-ray emission from comets, planets and stars -- benefits from an extraordinary effort to construct and distribute public spectral models. Cool star science has also often been the driver behind the production of new or improved atomic data. I will present several examples illustrating how cool star spectra are used to assess atomic data needs. Scientific successes from these efforts were highlighted at the recent NASA Laboratory Astrophysics Workshop at the University of Las Vegas Nevada, and in the subsequent report ``Laboratory Astrophysics White Paper.'' I will discuss the findings of this report in the context of cool star science. In particular, it is necessary to prioritize new efforts to increase the completeness and accuracy of the the atomic and molecular data that support the spectral modeling codes are needed. ----------------------------------