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The Divisumma 18 was an electronic printing business calculator manufactured by Olivetti in 1972 and designed by Milanese architect Mario Bellini. It was selected for its collection by the Museum of Modern Art in New York.

The skin of the Divisumma 18 is a distinctive shade of yellow, made from a combination injection-molded plastic and synthetic rubber.

References

1. Cara McCarty (1987). Mario Bellini: designer. Museum of Modern Art. ISBN 978-0-87070-224-2.
2. New York Media, LLC (29 June 1987). New York Magazine. New York Media, LLC. pp. 101–. ISSN 0028-7369. {{cite book}}: |website= ignored (help)
3. "Mario Bellini. Divisumma 18 Electronic Printing Calculator. 1972 | MoMA".
4. Aa.Vv. (2012-01-29). 100 objects of italian design La Triennale di Milano: Permanent Collection of Italian Design, The Milan Triennale. Gangemi Editore spa. pp. 150–. ISBN 978-88-492-4706-0.

v t e Olivetti
Key people	Executives Camillo Olivetti (founder and president, 1908–1938) Adriano Olivetti (president, 1938–1960) Franco Tatò (head of various divisions, 1956–1990) Designers and engineers Franco Albini Getulio Alviani Gae Aulenti Mario Bellini Natale Capellaro Gianni Colombo Carlo De Benedetti Michele De Lucchi Egon Eiermann Ignazio Gardella Franca Helg James Irvine Louis Kahn Bruno Munari Costantino Nivola Marcello Nizzoli Pier Giorgio Perotto Giovanni Pintori Carlo Scarpa Piero Scaruffi Ettore Sottsass George Sowden Grazia Varisco Lella Vignelli Massimo Vignelli Marco Zanuso
Computers	Mainframes Elea series (1957–1964) Personal computers P6040 (1975) P6060 (1975) P6066 (1975) M20 (1982) M24 (1983) Prodest PC128 (1985) M28 (1986) M19 (1986) Envision (1995) Laptops M10 (1983) Quaderno (1992) Calculators Programma 101 (1965) Divisumma 18 (1972)
Typewriters	Lettera 22 (1949) Valentine (1969)
Locations	500 Park Avenue Olivetti-Underwood Factory
Acquisitions	Telecom Italia (acquired Olivetti) Triumph-Adler Omnidata Underwood Typewriter Company
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