Mbé vs Penza

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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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Penza (Russian: Пе́нза, IPA: [ˈpʲɛnzə]) is the largest city and administrative center of Penza Oblast, Russia. It located on the Sura River, 625 kilometers (388 mi) southeast of Moscow.

As of the 2010 Census, Penza had a population of 517,311, making it the 38th-largest city in Russia.

Source: Wikipedia