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 were used inside the company and even sold commercially. The Apple IIe had a keyboard ROM that translated keystrokes into characters. The ROM contained both QWERTY and Dvorak patterns, but the QWERTY pattern was enabled by default. A modification could be made by pulling out the ROM, bending up four pins, soldering a resistor between two pins, soldering two others to a pair of wires connected to a DIP switch, which was installed in a pre-existing hole in the back of the machine, then plugging the modified ROM back in its socket. The "hack" was reversible and did no damage.