Regular readers of this blog will be aware I have become increasingly enthusiastic about Apple products. I had a Mac SE as a toy at work circa 1990, but at the time, most things about Apple irritated me. Now, though, after being eased in by iPhone and iPad (with a touch of Apple TV) I have gone all-Apple. The great thing about Apple products is that they combine style and function so well. They look good and they are a  delight to use - an irresistable (and sadly rare) combination. But there is one thing I have to seriously criticize them for, an essential for usability that they have repeatedly ignored. For years now I have used a series of ergonomic keyboards. The picture shows my last one - Microsoft's robust battleship of a board, the Natural Ergonomic Keyboard 4000 . I didn't go for this kind of thing because it looks funky. When I switched to writing most of the time, I found that I increasingly suffered from painful wrist strain after a typing bout. I can easily type...