The Cherry G80-5000, also known as the Cherry ErgoPlus (and as the Cherry MX 5000 or simply the Cherry 5000), was the first and only ergonomic mechanical keyboard produced and designed by Cherry. First introduced as early as 1994, it was the first keyboard to use Cherry MX Brown switches. The keyboard exists in at least two variants, with and without windows keys. A prototype variant, the V80-5000, with a different design and more solid case construction is known to exist and in the possession of a collector.
Cherry claims to have taken the ErgoPlus from the market in 1997, due to poor sales. Though models made as late as 1998 have been sighted.
The G80-5000 was invented by Günter Murmann and Manfred Frank.  Murmann was CEO of Cherry Europe from 2003 until his retirement in 2011.
- ↑ http://www.cherry.de/deutsch/service/ergonomie_anforderungen_tastatur.htm
- ↑ https://data.epo.org/publication-server/html-document?PN=EP0671751%20EP%200671751&iDocId=3357316
- ↑ http://www.kbdmania.net/xe/1019106#comment_1019359