Robert Mario Fano (born 1917 in Turin, Italy, as Roberto Mario Fano) is an Italian-American computer scientist, currently professor emeritus of Electrical Engineering and Computer Science at Massachusetts Institute of Technology. Fano is known principally for his work on information theory, inventing (with Claude Shannon) Shannon-Fano coding and deriving the Fano inequality. In the early 1960s, he was involved in the development of time-sharing computers, and served as director of MIT's Project MAC from its founding in 1963 until 1968.

Fano's father was the mathematician Gino Fano, his older brother was physicist Ugo Fano, and his cousin was Giulio Racah. He grew up in Turin and studied engineering as an undergraduate at the School of Engineering of Torino until 1939, when he emigrated to the United States as a result of anti-Jewish legislation passed under Benito Mussolini. He received his S.B. in electrical engineering from MIT in 1941, before joining the staff of the MIT Radiation Laboratory. After the war, he received an Sc.D., also from MIT, in 1947; his thesis, entitled "Theoretical Limitations on the Broadband Matching of Arbitrary Impedances", was supervised by Ernst Guillemin. He joined the MIT faculty in 1947. Between 1950 and 1953, he led the Radar Techniques Group at Lincoln Laboratory. In 1954, Fano was made an IEEE Fellow for "contributions in the field of information theory and microwave filters".

Fano is a town and comune of the province of Pesaro and Urbino in the Marche region of Italy. It is a beach resort 12 km southeast of Pesaro, located where the Via Flaminia reaches the Adriatic Sea. It is the third city in the region by population after Ancona and Pesaro.

An ancient town of Marche, it was known as Fanum Fortunae after a temple of Fortuna located there. Its first mention in history only dates from 49 BC, when Julius Caesar held it, along with Pisaurum and Ancona. Caesar Augustus established a colonia, and built a wall, some parts of which remain. In the AD 2 Augustus also built an arch (which is still standing) at the entrance to the town.

In January 271, the Roman Army defeated the Alamanni in the Battle of Fano that took place on the banks of the Metauro river just inland of Fano.

Fano was destroyed by Vitiges' Ostrogoths in AD 538. It was rebuilt by the Byzantines, becoming the capital of the maritime Pentapolis ("Five Cities") that included also Rimini, Pesaro, Senigallia and Ancona. In 754 it was donated to the Popes by the Frank kings.