Software for technical calculation of chemical reactors I'm not a chemical engineer and don't have good background in it.
Just my father asked me to do something for him, as I'm a computer engineering graduate.

This is a software for calculation of technical parameters of reactor. I haven't seen it. I've just printed output of it. Fields are like following:

5  REM**************
10 REM***********
20 REM  Name etc.
~~~~~~~~~~~~
35 REM ********** PRODUCTIVITY********
~~~~~~~~~~~~
155 REM ***** INPUTS*******
~~~~~~~~~~~~~~~~~~~~~~~~
220 DTB
240  DTS
~~~~~~~~~~~~~~~~~~~~
555 REM *********** CALCULATIONS****************
~~~~~~~~~~~~~~~~~~~~~~~~~
~
~
~
********RESULTS*************
DTO=75
G=543.2
Q=XXXX
XXXXXX


Can anyone help me to find what is the software for calculation. I'd be very grateful if you can help.
Years ago a colleague of mine mentioned ASPEN as a typical software (bundle) used to model chemical plants.  Despite this and this lack of examples how the print-out will look like -- and I did not work with it, either.