  Latest developments in theoretical computations since the international
Opacity Project (OP), under the new the Iron Project (IP) and extensions, are
described for applications to a variety of objects such as stellar atmospheres,
nebulae, and active galactic nuclei. The primary atomic processes are: electron
impact excitation (EIE), photoionization, electron-ion recombination, and
bound-bound transitions, all considered using the accurate and powerful
R-matrix method including relativistic effects. As an extension of the OP and
the IP, a self-consistent and unified theoretical treatment of photoionization
and recombination has been developed. Both the radiative and the dielectronic
recombination (RR and DR) processes are considered in a unified manner.
Photoionization and recombination cross sections are computed with identical
wavefunction expansions, thus ensuring self-consistency in an ab initio manner.
The new unified results differ from the sum of previous results for RR and DR
by up to a factor of 4 for the important but complex atomic systems such as Fe
I - V. The fundamental differences are due to quantum mechanical intereference
and coupling effects neglected in simpler approximations that unphysically
treat RR and DR separately, which can not be independently measured or
observed. I will also describe the electronic, web-interactive, database,
TIPTOPBASE, to archive the OP/IP data in a readily accessible manner.
TIPTOPBASE would also include electron-ion recombination data and new fine
structure transition probabilities. Efficient codes developed by M.J. Seaton to
calculate `customized' mixture opacities and radiative accelerations
('levitation') in stars will also be available.
