Leo I the Thracian

Leo I (Latin: Flavius Valerius Leo Augustus; 401 – 18 January 474) was Byzantine Emperor from 457 to 474. A native of Dacia Aureliana near historic Thrace, he was known as Leo the Thracian (Greek: Λέων Α' ὁ Θρᾷξ Leōn ha ho Thrax).

Ruling the Eastern Empire for nearly 20 years, Leo proved to be a capable ruler. He oversaw many ambitious political and military plans, aimed mostly for the aid of the faltering Western Roman Empire and recovering its former territories. He is notable for being the first Eastern Emperor to legislate in Greek rather than Latin.

He is commemorated as a Saint in the Orthodox Church, with his feast day on January 20.

Reign

He was born Leo Marcellus in Thracia or in Dacia Aureliana province in the year 401 to a Thraco-Roman family. His Dacian origin is mentioned by Candidus Isaurus, while John Malalas believes that he was of Bessian stock. He served in the Roman army, rising to the rank of comes. Leo was the last of a series of emperors placed on the throne by Aspar, the Alan serving as commander-in-chief of the army, who thought Leo would be an easy puppet ruler. Instead, Leo became more and more independent from Aspar, causing tension that would culminate in the assassination of the latter.

LEO (computer)

The LEO I (Lyons Electronic Office I) was the first computer used for commercial business applications.

The prototype LEO I was modelled closely on the Cambridge EDSAC. Its construction was overseen by Oliver Standingford, Raymond Thompson and David Caminer of J. Lyons and Co.. LEO I ran its first business application in 1951. In 1954 Lyons formed LEO Computers Ltd to market LEO I and its successors LEO II and LEO III to other companies. LEO Computers eventually became part of English Electric Company (EELM) and then International Computers Limited (ICL) and ultimately Fujitsu.

LEO series computers were still in use until 1981.

Origins and initial design

J. Lyons and Co., one of the UK's leading catering and food manufacturing companies in the first half of the 20th century, sent two of its senior managers, Oliver Standingford and Raymond Thompson, to the USA in 1947 to look at new business methods developed during the Second World War. During their visit they met Herman Goldstine, one of the original developers of ENIAC, the first general-purpose electronic computer (although it had no stored program). Standingford and Thompson saw the potential of computers to help solve the problem of administering a major business enterprise. They also learned from Goldstine that, back in the UK, Douglas Hartree and Maurice Wilkes were actually building another such machine, the pioneering EDSAC computer, at the University of Cambridge.

Leo I

Leo I may refer to:

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M96 Group

Coordinates: 10^h 48^m 34.7^s, +12° 40′ 15″

The M96 Group (also known as the Leo I Group) is a group of galaxies in the constellation Leo. This group contains between 8 and 24 galaxies, including three Messier objects. The group is one of many groups that lies within the Virgo Supercluster (i.e. the Local Supercluster).

Members

The table below lists galaxies that have been consistently identified as group members in the Nearby Galaxies Catalog, the survey of Fouque et al., the Lyons Groups of Galaxies (LGG) Catalog, and the three group lists created from the Nearby Optical Galaxy sample of Giuricin et al.

Nearby groups

The Leo Triplet, which includes the spiral galaxies M65, M66, and NGC 3628, is located physically near the M96 Group. Some group identification algorithms actually identify the Leo Triplet at part of the M96 Group. The two groups may actually be separate parts of a much larger group.

Gallery

M96 Group also includes the bright galaxies Messier 105 and Messier 95.