Fun piece to write for Macworld, on the Apple Adjustable Keyboard, ergonomics and touch typing: http://www.macworld.com/article/2854292
So few of us type “properly” these days that you might never have done this before, and you’ll notice that while your arms stretch towards the keyboard at about 45 degrees, your hands have to splay outwards uncomfortably. This can lead to some terrible carpal tunnel syndrome, severely damaging your hands. Ergonomic keyboards, then, attempt to solve this by allowing you to rest your fingers on the home keys while keeping your wrists straight.
Taking that photo was a challenge for a works-on-his-own freelancer! Pile of books, iPhone resting on top held in place with Blu-Tack, timer.