Microsoft's Natural Ergonomic Keyboard 4000 - an ergonomic breakthrough?

We call the Natural Ergonomic Keyboard 4000 an “ergonomic breakthrough” because this keyboard incorporates the best ergonomic advances we’ve developed in the ten plus years since the Natural Keyboard design first launched. This latest keyboard builds on our Natural Keyboard design, which has been extremely successful. The Natural Keyboard design was the subject of two independent research projects which found that it is associated with a reduction in computer-related pain and that it is associated with a reduction in carpal tunnel syndrome symptoms. This kind of benefit has helped the Natural design become the No. 1 best-selling ergonomic keyboard and develop a loyal following among people who are concerned with comfort.