JCUKEN

JCUKEN (ЙЦУКЕН, also known as YCUKEN, YTsUKEN and JTSUKEN) is the main Cyrillic keyboard layout[1] for the Russian language in computers and typewriters.

After the reform, the JIUKEN layout sees the following modifications:[2] It is only on July 1, 1953, that the norm GOST 6431-52 on the arrangement of letters, numbers and symbols on the keyboard began to operate.

This layout is also suitable for Kalmyk and Turkmen (Cyrillic) as their alphabets are practically identical to Tatar.

An "upgraded" version based on the basic Russian one, the additional Kyrgyz letters are typed with AltGr (right Alt).

On the Macedonian keyboard layouts under Microsoft Windows, AltGr can be used to access additional letters and punctuation.

In 2006, Dimiter Skordev, from the Faculty of Mathematics and Informatics at Sofia University, co-authored a proposal for a new phonetic keyboard layout.

[5] This proposal was included in the draft of the national standard BDS 5237:2006, titled "Keyboard Layouts for Devices Typing in Bulgarian".

[5][6] The introduction of the new phonetic keyboard layout as part of the BDS 5237:2006 standard sparked considerable controversy.

There were no extensive public consultations, nor was the opinion of the Bulgarian Association of Information Technologies [bg] taken into account.

According to the creators of the standard, tests were conducted in elite schools in Sofia during the project's development.

The study analyzed "10,000 words from various fields of human life" to create a unified Bulgarian keyboard layout.

The study resulted in a booklet, the first documented source regulating Bulgarian typewriting and introducing professional ten-finger typing.