H2F Software, the origins of SOF
 

Did some research. H2F is a small Düsseldorf based company who does corporate software for cash register systems and especially for barber shops :D
Ralf Hildenhagen, the owner of the company, produces google hits with barber software as well as with historical articles in a online literature magazine. So he is either the author of that historic text or it is simply a namesake, but Hildenhagen is not exactly a common name.
One of the programmers names showed at informatics department at Düsseldorf University but I am not sure as what (TA maybe?).
Anyway, here's their corporate website (in german) http://h2f.com/
They don't have an email adress visible, but a phone number and a contact form for emails http://h2f.com/kontakt1.html

Btw, their other game project may be interesting as well
http://www.mister-bumblebee.de/
"Mister Bumblebee - the great race"
:rotfl::damn:

Of course .... cash register systems and bumblebees ... the connection to Uboats is so obvious now ;)