Mbé vs Ivrea

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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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Ivrea (Italian: [iˈvrɛːa]; Piedmontese: Ivrèja [iˈʋrɛja]; French: Ivrée; Latin: Eporedia) is a town and comune of the Metropolitan City of Turin in the Piedmont region of northwestern Italy. Situated on the road leading to the Aosta Valley (part of the medieval Via Francigena), it straddles the Dora Baltea and is regarded as the centre of the Canavese area.

Ivrea lies in a basin that in prehistoric times formed a large lake. Today five smaller lakes — Sirio, San Michele, Pistono, Nero and Campagna — are found in the area around the town. On July 1, 2018, the site which is known as "Industrial City of the 20th Century" was listed as a UNESCO World Heritage site.

Source: Wikipedia