Mbé vs Doboj

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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

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Doboj (Serbian Cyrillic: Добој, pronounced [dôboj] ) is a city located in Republika Srpska, an entity of Bosnia and Herzegovina. It is situated on the banks of Bosna river, in the northern region of the Republika Srpska. As of 2013, it has a population of 71,441 inhabitants.

Doboj is the largest national railway junction and the operational base of the Railways Corporation of Bosnia and Herzegovina is located in Doboj. It is one of the oldest cities in the country and the most important urban center in northern Republika Srpska.

Source: Wikipedia