  I explore computer simulations of the dynamics of small multi-fermion lattice
systems. The method is more general, but I concentrate on Hubbard type models
where the fermions hop between a small number of connected sites. I use the
natural mapping of fermion occupation numbers onto computer bits. Signs from
fermion interchange are reduced to bit counting. The technique inherently
requires computer resources growing exponentially with the system volume; so,
it restricted to modestly small systems. Large volume results would require
combining these techniques with further approximations, perhaps in a recursive
renormalization group manner.
