  micrOMEGAs is a numerical code to compute dark matter (DM) observables in
generic extensions of the Standard Model of particle physics. We present a new
version of micrOMEGAs that includes a generalization of the Boltzmann equations
governing the DM cosmic abundance evolution which can be solved to compute the
relic density of N-component DM. The direct and indirect detection rates in
such scenarios take into account the relative contribution of each component
such that constraints on the combined signal of all DM components can be
imposed. The co-scattering mechanism for DM production is also included,
whereas the routines used to compute the relic density of feebly interacting
particles have been improved in order to take into account the effect of
thermal masses of t-channel particles. Finally, the tables for the DM
self-annihilation - induced photon spectra have been extended down to DM masses
of 110 MeV, and they now include annihilation channels into light mesons.
