QWERTY

The QWERTY design was patented by Christopher Sholes in 1868, and sold to Remington[?] in 1873, when it first appeared in typewriters. (This patent has since expired.)

Frequently-used pairs of letters were separated in an attempt to stop the typebars[?] from intertwining and becoming stuck, thus forcing the typist to manually unstick the typebars and also frequently blotting the document. (The home row (ASDFGHJKL) of the QWERTY layout is thought to be a remnant of the old alphabetical layout that QWERTY replaced.) It also alternated keys between hands, allowing one hand to move into position while the other hand strikes a key. This sped up both the original double-handed hunt-and-peck technique and the later touch typing technique; however, single-handed words such as "stewardess" and "monopoly" show flaws in the alternation.

Tests have shown that other arrangements of keys may lead to slightly more efficient typing of typical English text, and the Dvorak Simplified Keyboard arrangement (1936) has had some success in that regard, but the QWERTY arrangement remains the most popular, largely due both to market inertia and to tests showing little significant performance difference between those who first learned to type on QWERTY and those who first learned to type on Dvorak. (In fact, Sholes himself patented a different arrangement more similar to Dvorak's, but it never became popular.) These tests are critisized of being inconclusive. Many users of Dvorak say that QWERTY is far less ergonomic than Dvorak because QWERTY spreads the most commonly used letters out around the entire keyboard while Dvorak puts them in the home row. Minor changes to the arrangement are made for other languages; for example, German keyboards interchange the "Z" and "Y" keys because Z and A often appear next to each other in the German language. The Qwerty Layout

External links

• "The Fable of the Keys" http://wwwpub.utdallas.edu/~liebowit/keys1
• "The QWERTY myth" http://www.independent.org/tii/news/liebowitz_economist
• http://www.mwbrooks.com/dvorak/