Keyboards used to be in alphabetical order however the layout was changed so as to prevent jams while typing at speed. His layout was devised and created in the early 1870s by Christopher Latham Sholes. For more information, visit http://en.wikipedia.org/wiki/QWERTY#History_and_purposes.
2 years ago
Last edited at 7:26PM on 4/29/2012
Because the way keyboards are set up depends on how often the keys are used, which is why a, s, d, f, g, h, j, k, and l are in the middle row, where your fingers go. The keys like q, z, x, and p are harder to reach because they're not as common. However, not all keyboards are set up that way...just English ones, primarily. France uses a keyboard with AZERTY on the top, and many countries use QWERTZ keyboards.
Good question! I firmly believe that invention is the product for needs and question against current status. Well, regarding this question I'm not sure but this sequence may be best fit for typing at that time of qwerty keyboard came about.