DHWSAVE.CBL --------------- written in Enterprise COBOL v6.3 for z/OS & Unix
dhwsave.COB --------------- written in VSI COBOL for Open VMS
dhw_savings_calc.py ------- written in Python3 for Windows, Linux, & Unix consoles
dhw_savings_calc_gui.py --- written in Python3 with the tkinter module for Windows & Linux
dhwsave.rexx -------------- written in REXX for IBM z/OS; sends output to console
dhwsvrpt.rexx ------------- written in REXX for IBM; sends output to console & sequential dataset