Pier Giorgio Perotto
Pier Giorgio Perotto (Turin, December 24, 1930 – Genoa, January 23, 2002) was an Italian electrical engineer and inventor. Working for the manufacturer Olivetti, he led a design team that built the Programma 101, the world’s first personal computer.
Graduated at the Turin Polytechnic, Perotto taught for many years at the same University and published several books and articles regarding strategy, business organization and technology.
He began his career at Fiat and later on moved to the machine company Olivetti. Working as General Director of projects and research at the Ivrea’s company, he played a major role in the transformation of this multinational company from a mechanical to electronics and systems company.
Together with Sergio Raimondi, Perotto launched FINSA Consulting in 1997, becoming the president since its foundation. After this moment he turned himself into a committed teacher and a prolific writer, writing with many essays (in italian) about business manangement and future of computing.
In 1991, he earned the Leonardo da Vinci Award for having developed a ground-breaking machine, the Programma 101, the world’s very first personal computer.
The innovative computer, also known as Perottina, named after its inventor, was the first computer in history purposely designed to be on a desktop. It made possible to use a computer at home, office and places previously not reached by huge mainframes of the time. Programma 101 was officially launched at the 1964 New York World's Fair, attracting major interest from the public and the press. Volume production started in 1965, selling about 44,000 units primarily in the US market. NASA bought ten models and used to plan the Apollo 11 landing on the moon.
By Apollo 11 we had a desktop computer, sort of, kind of, called an Olivetti Programma 101. It was a kind of supercalculator. It was probably a foot and a half square, and about maybe eight inches tall. It would add, subtract, multiply, and divide, but it would remember a sequence of these things, and it would record that sequence on a magnetic card, a magnetic strip that was about a foot long and two inches wide. So you could write a sequence, a programming sequence, and load it in there, and the if you would — the Lunar Module high-gain antenna was not very smart, it didn't know where Earth was. [...] We would have to run four separate programs on this Programma 101 [...]— David W. Whittle, 2006 
- "'Desk-top' computer is typewriter size". Business Week. October 23, 1965.
- "Desk-Top Size Computer Is Being Sold by Olivetti For First Time in US". The Wall Street Journal. October 15, 1965.
- http://www.finsa.it/en/ChiSiamo/persone/pgperotto.aspx, FINSA, Pier Giorgio Perotto, founder and former president.
- "12222 Perotto (1982 WA)". JPL Small-Body Database Browser. Retrieved October 28, 2015.
- , Olivetti Programma 101 "Perottina", Wednesday, December 18, 2013.
- Whittle, David W (Feb 16, 2006). Johnson, Sandra, interviewer, transcriptor & (ed.). "NASA Space Center" (PDF). Oral History Project. Houston, TX.
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- Obituary: Pier Giorgio Perotto, Independent UK, 5 February 2002
- 101 Project, official site of 101 initiative documentary project.
- Bonomi, Francesco, Description of the P-101, IT: Silab, retrieved 2009-12-17.
- Olivetti, Programma 101 General Reference Manual, hosted by the Old Calculator Web Museum, retrieved 2009-12-17.
- Internal pictures Old Calculator Web Museum.
- A simulator of the Olivetti Programma 101.
- "General Reference Manual". Old Calculator Museum.
- Olivetti Programma 101 Emulator/Trainer, RetroWiki.es
- A Technical Description of the Olivetti Programma 101 with a picture gallery, by Alfredo Logioia.