  We have simulated the formation and evolution of large-scale structure in the
universe, for 68 different COBE-normalized cosmological models. For each
cosmological model, we have performed between 1 and 3 simulations, for a total
of 160 simulations. This constitutes the largest database of cosmological
simulations ever assembled, and the largest cosmological parameter space ever
covered by such simulations. We are making this database available to the
astronomical community. We provide instructions for accessing the database and
for converting the data from computational units to physical units.
  The database includes Tilted Cold Dark Matter (TCDM) models, Tilted Open Cold
Dark Matter (TOCDM) models, and Tilted Lambda Cold Dark Matter (TLCDM) models.
(For several simulations, the primordial exponent n of the power spectrum is
near unity, hence these simulations can be considered as "untilted.") The
simulations cover a 4-dimensional cosmological parameter phase space, the
parameters being the present density parameter Omega_0, cosmological constant
lambda_0, and Hubble constant H_0, and the rms density fluctuation sigma_8 at
scale 8/h Mpc. All simulations were performed using a P3M algorithm with 64^3
particles on a 128^3 mesh, in a cubic volume of comoving size 128 Mpc. Each
simulation starts at a redshift of 24, and is carried up to the present. More
simulations will be added to the database in the future.
