The keyboard is not assembled in alphabetical order because it has the same layout as the keyboard of a typewriter. Early typewriters used alphabetical order, but they were prone to jams when typing letters that were close together quickly. The keyboard of a typewriter was now created in the QWERTY design to slow typists down. This is the reason why keyboard is not assembled in alphabetical order.
The reason that a keyboard is not arranged and assembled in alphabetical order is that they keys are arranged in a sequence of the letters being most used. A computer keyboard is patterned after the old manual typewriter keyboard. This keyboard is also known as the QWERTY keyboard. The keyboard is setup so that each hand has a certain amount of keys that it can depress but at the same time those corresponding letters being ones that are mostly used.
If the keys were lined up in alphabetical order, it would be pretty much impossible for someone to be able to type as fast as they can. That is another reason that the keyboard was not assembled in alphabetical order. If its was, typing would be harder and the product and result that comes from typing would be slow and there pretty much would be a lot more errors in typing. The reason that a keyboard keys are not assembled in alphabetical order is to allow for more efficient typing.