Viseu vs Mbé

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Viseu (Portuguese pronunciation: [viˈzew] (listen)) is a city and municipality in the Centro Region of Portugal and the capital of the district of the same name, with a population of 100,000 inhabitants, and center of the Viseu Dão Lafões intermunipical community, with 267,633 inhabitants. Settled during the period of the early Iberian Castro culture, the territory of Viseu was populated by a series of cultures including the Romans, Suebs, Visigoths and Moors. During the Roman occupation of Iberia, Viriathus, rebel leader of the Lusitanians, is assumed to have lived for a time in the vicinity.

During the Middle Ages, the city often served as seat for Visigothic nobles (such as King Roderic), and is considered one of the probable birthplaces of Afonso Henriques, first King of Portugal.Viseu is a regional economic hub with a strong wine industry and is the seat of international conglomerate Visabeira. The city is also a cultural center, home to the nationally acclaimed Grão Vasco Museum, seat of the Roman Catholic Diocese of Viseu, and pole of national universities, including the Catholic University of Portugal.

Source: Wikipedia

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In computer science, group coded recording or group code recording (GCR) refers to several distinct but related encoding methods for representing data on magnetic media. The first, used in 6250 bpi magnetic tape since 1973, is an error-correcting code combined with a run-length limited (RLL) encoding scheme, belonging into the group of modulation codes.

The others are different mainframe hard disk as well as floppy disk encoding methods used in some microcomputers until the late 1980s. GCR is a modified form of a NRZI code, but necessarily with a higher transition density.

Source: Wikipedia