The QWERTY keyboard was invented first and it was widely used before the DVORAK keyboard came along. It was too much of a learning curve to get everyone to convert to a DVORAK keyboard since it would mean that you would have to start from scratch.

Also, there are some doubts as to whether the DVORAK keyboard is really much more efficient than the QWERTY keyboard. Once you get used to QWERTY, it...

The QWERTY keyboard was invented first and it was widely used before the DVORAK keyboard came along. It was too much of a learning curve to get everyone to convert to a DVORAK keyboard since it would mean that you would have to start from scratch.

Also, there are some doubts as to whether the DVORAK keyboard is really much more efficient than the QWERTY keyboard. Once you get used to QWERTY, it's not going to make much of a difference in speed when compared to a DVORAK keyboard. Even if you improve your typing speed by 20%, it's not really worth it if you consider the hundreds of hours you have to invest to learn how to touch type on a new keyboard.