The neutron as one of the basic building blocks of matter plays a major role in both fundamental physics and applications. Volume I/16 presents an up-to-date collection of neutron data for neutron energies up to 20 MeV, with emphasis on energies in the keV range or below. Subvolume I/16B is a compilation of all known neutron resonance parameters of nuclei. The amount of data is so large that only the most important and recent data for each isotope are printed in the book, while on the accompanying CD-ROM the complete sets of resonance parameter, also those for higher energies, can be found for each isotope.