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
2003DIN 2137-2:2003 Text and office systems - Keyboards - Part 2: German keyboard for data and text processing; Key arrangement and allocation of graphic characters to keys