Kazan vs Mbé

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Kazan (; Tatar: Казан; Russian: Каза́нь, IPA: [kɐˈzanʲ]), is the capital and largest city of the Republic of Tatarstan in Russia. The city lies at the confluence of the Volga and the Kazanka rivers, covering an area of 425.3 square kilometres (164.2 square miles), with a population of over 1.2 million residents, up to roughly 1.6 million residents in the urban agglomeration. Kazan is the fifth-largest city in Russia, and the most populous city on the Volga, as well as the Volga Federal District. Ancient Kazan was founded in the late 13th century by the Golden Horde. In 1438, Kazan became the capital of the Khanate of Kazan. In 1552, Kazan was captured by Ivan the Terrible and became a part of Russia. The city was seized and largely destroyed during Pugachev's Rebellion of 1773–75, but was later rebuilt during the reign of Catherine the Great.

In the following centuries, Kazan grew to become a major industrial, cultural and religious centre of Russia. In 1920, after the Russian SFSR became a part of the Soviet Union, Kazan became the capital of the Tatar ASSR. After the dissolution of the Soviet Union, Kazan stayed as the capital of the Republic of Tatarstan. Kazan is renowned for its vibrant mix of Tatar and Russian cultures. In 2015, 2.1 million tourists visited Kazan, and 1.5 million tourists visited the Kazan Kremlin, a World Heritage Site. In April 2009, the Russian Patent Office granted Kazan the right to brand itself as the "Third Capital of Russia". In 2009 it was chosen as the "Sports capital of Russia", and it still is referred to as such. Kazan hosted the 2013 Summer Universiade, and was one of the host cities of the 2018 FIFA World Cup.

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