The production of B-c and B-c mesons via gluon-gluon, photon-gluon, a
nd photon-photon fusion processes is considered on the basis of the no
nrelativistic color-singlet model and perturbative QCD. The correspond
ing cross sections for pp, ep, and gamma gamma collisions at energies
of present and future colliders are calculated, and uncertainties in t
heoretical predictions are analyzed.