The Logos 27 is the culmination of twenty years of Olivetti printing calculator development. Almost twice the size and weight of the Divisumma range, it is also twice as fast. During multiplication and division, the Logos operates at 600 cycles per minute. It also has three memories, each serving a slightly different function. Natale Capellaro was in charge of the mechanical design, and the industrial design was by Ettore Sottsass.

This machine made its debut at the Business Equipment Manufacturers Association (BEMA) show in New York in late 1965. A large booth was dedicated to the new machine, with the new, fully electronic Programma 101 relegated to a small corner display. Within a few years, the electronic calculator had taken over the market, and Olivetti offered large trade-in allowances for the Logos 27.

This is the largest and heaviest machine in the collection.

My sincere thanks to Martin Löfgren for the donation of this machine