A wonderful machine, with a great design. The Italians managed to package a lot of machine into a relatively small footprint for the time. Very nice mechanical design and electronic elegance. Plus, with the addition of various peripheral devices (a progrmamer, paper tape reader/punch, and others), The 86 could serve as the "CPU" of a very capable "personal computing system". There's a lot of history relating to the IME calculators, particularly the IME 84 (IME's first electronic calculator) and future calculator industry developments. I haven't come across a manual for one of these machines yet, and have been looking for a long time. If you do happen to come across one, I'd appreciate if you'd let me know. Of course, I'll keep your message in my reference folder, and if I come across a manual, I'll get in touch. I know well how these machines operate. If you have any questions on how to operate it, drop me an off-list Email. Rick Bensene r-i-c-k-b-at-b-e-n-s-e-n-e.c-o-m (delete dashes, and replace "at" with the obvious character) The Old Calculator Museum http://oldcalculatormuseum.com