  We present the fourth in a series of catalogs of gamma-ray bursts (GRBs)
observed with Fermi's Gamma-Ray Burst Monitor (Fermi-GBM). It extends the six
year catalog by four more years, now covering the ten year time period from
trigger enabling on 2008 July 12 to 2018 July 11. During this time period GBM
triggered almost twice a day on transient events of which we identifyied 2356
as cosmic GRBs. Additional trigger events were due to solar are events,
magnetar burst activities, and terrestrial gamma-ray flashes. The intention of
the GBM GRB catalog series is to provide updated information to the community
on the most important observables of the GBM-detected GRBs. For each GRB the
location and main characteristics of the prompt emission, the duration, peak
flux, and fluence are derived. The latter two quantities are calculated for the
50-300 keV energy band, where the maximum energy release of GRBs in the
instrument reference system is observed and also for a broader energy band from
10-1000 keV, exploiting the full energy range of GBM's low-energy detectors.
Furthermore, information is given on the settings of the triggering criteria
and exceptional operational conditions during years 7 to 10 in the mission.
This fourth catalog is an official product of the Fermi-GBM science team, and
the data files containing the complete results are available from the
High-Energy Astrophysics Science Archive Research Center (HEASARC).
