Re: Olivetti Tetractys?

From: Mark Glusker
Email: glusker@yahoo.com


Scroll down this page to the posting on the Olivetti Divisumma 24. It is a similar machine and I wrote up some detailed instructions on how to use the basic functions. The Tetractys is like two Divisumma's in one machine. That is why it has a two sets of add, subtract, total and subtotal keys.