Two programs for studying stellar evolution and nuclear astrophysics
  Two FORTRAN programs are presented which plot the Hertzsprung-Russell diagram and the temporal evolution of such stellar quantities as: central and photospheric isotopic abundances, central densities and temperatures, luminosities,effective temperatures and photospheric radii for a wide range of stellar masses. The programs, which are modifications and extensions of some modules of the TYCHO 6.0 stellar evolution package, are accompanied by various control input files as well as by a library of data. The data library is actually one of the output files generated by TYCHO 7.0 (a modified version of TYCHO 6.0), while the plots themselves are generated by the PGPLOT Graphics Subroutine Library which is also publicly available and well cited. 
Theodore Liolios