> Digita's Amiga Office software (Wordworth, Turbocalc)

I don't think TurboCalc is or was a Digita product.

"Written by Michael Friedrich - Creative Developments
Distribuited by Stefan Ossowskis Schatztruhe
Distributed in italy by NonSoloSoft"
http://www.amiworld.it/programmi/turbocalc/turbocalc_eng.html