Mbé vs Chlef

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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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Chlef (Arabic: الشلف‎, Berber: Clef) is the capital of Chlef Province, Algeria. Located in the north of Algeria, 200 kilometres (120 mi) west of the capital, Algiers, it was founded in 1843, as Orléansville, on the ruins of Roman Castellum Tingitanum. In 1962, it was renamed al-Asnam, but since 1980 it has borne its present name, Chlef, which is derived from the name of the longest river in Algeria.

It is home to the soccer club ASO Chlef, the Hassiba Ben Bouali university, and the ruins of the basilica of Reparatus, who was bishop of Castellum Tingitanum from 465 to 475. A corner of the flooring of the basilica contained a mosaic labyrinth, the oldest known example of Christian use of this motif.

Source: Wikipedia