QWERTY official languages of the European Union (excluding Bulgarian and Greek). Some letters, like Ł/ł needed for Slavic languages, are accessed by a special "overstrike" key combination acting like a dead key. However, the Romanian letters Ș/ș and Ț/ț (S/s and T/t with comma below) are not supported; the presumption is that Ş/ş and Ţ/ţ (with cedilla) suffice as surrogates. The Icelandic keyboard layout is different from the standard QWERTY keyboard because the Icelandic alphabet has some special letters, most of which it shares with the other Nordic countries: Þ/þ, Ð/ð, Æ/æ, and Ö/ö. (Æ/æ also occurs in Norwegian, Danish and
Dvorak Simplified Keyboard faster typing while also reducing repetitive strain injuries, although that claim is controversial. Although the Dvorak Simplified Keyboard (DSK) has failed to replace the standard QWERTY, most major modern operating systems (such as Windows, macOS, GNU/Linux, Android, Chrome OS, and BSD) allow a user to switch to the Dvorak layout. iOS does not provide a system-wide, touchscreen Dvorak keyboard, although third-party software is capable of adding the pattern to iOS, and the layout can be chosen for use with any hardware keyboard, regardless of printed layout. The Dvorak layout was designed to replace the QWERTY keyboard pattern (the "de facto"