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 color of yellow, made from a combination injection-molded plastic and synthetic rubber.
- Cara McCarty (1987). Mario Bellini: designer. Museum of Modern Art. ISBN 978-0-87070-224-2.
- New York Media, LLC (29 June 1987). New York Magazine. New York Media, LLC. pp. 101–. ISSN 0028-7369.
- 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.
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