2018DIN 2137-1:2018 Keyboards for data and text input - Part 1: German keyboard layout; Text in German and English
2012DIN 2137-1:2012 Keyboards for data and text input - Part 1: German keyboard layout; Text in German and English
1995DIN 2137-1:1995 Text and office systems - Keyboards - Part 1: German keyboard for typewriters; key arrangement and allocation of characters to keys