急問~ computer keyboard

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Keyboard History
Standard Qwerty Keyboard Origin:
Late 1870's
In 1872, Remington produced the first mechanical typewriter, patented by C. Latham Sholes. Soon typists were going so fast that they were able to jam the keys which flew up to hit the typewriter ribbon. In the late 1870's: the "improved" Qwerty layout was designed to slow down typing, so those pesky keys would not jam anymore. Here is the speed trap we are stuck with today, 130 years later.

Electric Typewriters: 1930's
In the 1930's electric typewriters were invented. What a great opportunity to improve on the keyboard layout. Sadly, effortless action on keys, including shift, was not sufficient to draw new customers. They had to have Qwerty too!

In 1936, August Dvorak patented a new layout to: (a) Reduce finger reach and strain by putting common letters on the home row (in red), (b) Avoid awkward use of key pairs (digraphs), to improve speed. Here's the Dvorak keyboard:

Personal Computers: 1970's
A lot of things have been invented since the 1800s: Electricity, radio, airplanes, computers. ... Slow old Qwerty has survived them all.

Although personal computers now have the power of former mainframes, we continue to be hobbled by an entirely obsolete user interface like the Qwerty keyboard

Alternative Keyboards: 1990's
In the 1990's, at least two keyboards were patented with the aim of reducing finger reach and strain and to a lesser extent, minimizing the effort of change from Qwerty. Unfortunately, the main emphasis was on the middle or home row. Six frequent letters moved from Qwerty locations, making these new keyboards still hard to learn

The XPeRT Keyboard Solution: 2003
XPeRT is a keyboard Built for Speed ..... AND ...... easy transition from Qwerty.
Hunt & Peck keyboard users can reach touch typing speeds with no special training.
The XPeRT Keyboard moves only two high frequency letters, A + N (not six) and adds a second E key (the most common letter at 13%). The change is easy to learn. AND, it optimizes key sequences to be struck by opposite hands, the fastest way of typing. With these 3 elegant moves, the XPeRT keyboard goes from digraph disabled to speed enabled.

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