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 took 100 hours of training, more than was claimed in Dvorak's Navy test), Strong took a second group of QWERTY typists chosen for equal ability to the Dvorak group and retrained them in QWERTY in order to improve their speed at the same time the Dvorak typists were training. The carefully controlled study failed to show any benefit to the Dvorak keyboard layout in typing or training speed. Strong recommended speed training with QWERTY rather than switching keyboards, and attributed the previous apparent benefits of Dvorak to improper experimental design and outright bias on the part of Dvorak, who had