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 two sets of add, subtract, total and subtotal keys.