tw.for         35627 06-07-94  Source code, 1st version
tw1.for        35665 06-12-94  Versions
tw2.for        34728 06-24-94  Versions
tw3.for        34967 07-02-94  Versions
tw4.for        34972 07-10-94  Versions
twz.for        34739 08-17-94  Versions