LYCOS RETRIEVER 
Dvorak: Dvorak Keyboard
built 803 days ago
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The Dvorak keyboard is an ergonomic alternative to the layout commonly found on typewriters and computers known as "Qwerty". The Qwerty keyboard was designed in the 1870s to accommodate the slow mechanical movement of early typewriters. When it was designed, touch typing literally hadn't even been thought of yet! It's hardly an efficient design for today's use. By contrast, the Dvorak (pronounced "duh-VOR-ack", not like the Czech composer!) keyboard was designed with emphasis on typist comfort, high productivity and ease of learning -- it's much easier to learn! There were several variations in the Dvorak's design in its first few decades, but these were settled when the American National Standards Institute approved a standard for the layout of the Dvorak in 1982.
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Dvorak is an alternative to Qwerty. It is a keyboard layout designed to minimise movement, and make typing as easy and painless as possible. The idea behind it is to have the most commonly typed keys under the fingers, and make it as easy as possible to type common words and combinations of letters. To give an impressions of just how big a difference this makes, consider that the average Dvorak typist's fingers will travel about one mile in a day of typing. A Qwerty typist's will travel anything from 16 to 20 miles. Try to consider, for a moment, the effect that must have on your fingers.
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Note that Dvorak's keyboard had shift keys, but they are omitted from the above figure for reasons of clarity. The results of Dvorak's innovations were tremendously effective. Using his layout, the typist's fingers spend 70% of their time on the home row and 80% of this time on their home keys. Thus, as compared to the approximately 120 words that can be constructed from the home row keys of the QWERTY keyboard, it is possible to construct more than 3,000 words on Dvorak's home row (or 10,000 words if you're talking to someone who's trying to sell you one). Also, Dvorak's scheme reduces the motion of the hands by a factor of three, and improves typing accuracy and speed by approximately 50%, and 20%, respectively.
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The Dvorak has the most-used consonants on the right side of the home row, and the vowels on the left side of the home row. Among other design features, it is set up to facilitate keying in a back-and-forth motion -- (right hand, then left hand, then right, etc.) When the same hand has to be used for more than one letter in a row (e.g., the common t-h), it is designed not only to use different fingers when possible (to make keying quicker and easier), but ... to progress from the outer fingers to the inner fingers ("inboard stroke flow") -- it's easier to drum your fingers this way (try it on the tabletop). The back-and-forth flow obviously makes typing quicker and easier: try typing the word "minimum" on the Qwerty keyboard, then look how you'd type it on Dvorak. The design puts fully 70 percent of all English keystrokes on the home row (only 32 percent of Qwerty's are on the home row), making Dvorak much easier, faster, and -- probably (no formal studies have been done as yet) -- less likely to result in carpal tunnel syndrome and other repetitive motion injuries.
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The Dvorak layout was designed to address the problems of inefficiency and fatigue which characterized the QWERTY keyboard layout. The QWERTY layout was introduced in the 1860s, being used on the first commercially-successful typewriter, the machine invented by Christopher Sholes. The QWERTY layout was designed so that successive keystrokes would alternate between sides of the keyboard so as to avoid jams. Some sources ... claim that the QWERTY layout was designed to slow down typing speed to further reduce jamming.[3]
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According to Dvorak, prior to World War II, researchers had found that after three years of typing instruction, the average typing student's speed was 47 net words per minute (NWPM). Since typists were scarce during the war, the U.S. Navy selected fourteen typists for a 1944 study to assess whether Dvorak retraining would be feasible. Dvorak found that it took an average of only 52 hours of training for those typists' speeds on the Dvorak keyboard to reach their average speeds on the qwerty keyboard. By the end of the study their Dvorak speeds were 74 percent faster than their qwerty speeds, and their accuracies had increased by 68 percent.
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Dvorak Keyboard