  We describe the code HFODD which solves the nuclear Skyrme-Hartree-Fock
problem by using the deformed Cartesian harmonic oscillator basis. The user has
a possibility of choosing among various symmetries of the nuclear HF problem
for rotating or non-rotating nuclei; they vary from the non-axial
parity-invariant nuclear shapes, through those also breaking the intrinsic
parity, towards the least-restrictive case corresponding to only one symmetry
plane. The code provides a solution for a complete superdeformed rotational
band in an A~150 nucleus within one CPU hour of the CRAY C-90 supercomputer or
within two-three CPU hours of a fast workstation.
