  We present the systematic spectral analyses of gamma-ray bursts (GRBs)
detected by the Fermi Gamma-Ray Burst Monitor (GBM) during its first ten years
of operation. This catalog contains two types of spectra; time-integrated
spectral fits and spectral fits at the brightest time bin, from 2297 GRBs,
resulting in a compendium of over 18000 spectra. The four different spectral
models used for fitting the spectra were selected based on their empirical
importance to the shape of many GRBs. We describe in detail our procedure and
criteria for the analyses, and present the bulk results in the form of
parameter distributions both in the observer frame and in the GRB rest frame.
941 GRBs from the first four years have been re-fitted using the same
methodology as that of the 1356 GRBs in years five through ten. The data files
containing the complete results are available from the High-Energy Astrophysics
Science Archive Research Center (HEASARC).
