A resonance ionization spectroscopy data service has been established at the National Institute of Standards and Technology. It publishes formatted data sheets which provide the atomic and laser physics information to apply RIS/RIMS to a given element. A first group of ten data sheets has been published. It covers As, B, Cd, C, Ge, Au, Fe, Pb, Si, and Zn. A second group has been submitted for publication. It covers Al, Ca, Cs, Cr, Co, Cu, Kr, Mg, Hg, and Ni. More will be produced in the future.