Why aren't letters in the keyboard arranged alphabetically?

Answer 1

The most common keyboard layout is known as QWERTY, named for the first six letters of the top right hand part of the keyboard. This design was created by Christopher Sholes in 1874. Because of the typewriter Sholes, a newspaper editor, was using at that time the printing point was below the paper carriage. Because of this and the tendency of the keys to clash and jam, the person typing would not know of any mistakes made until after the carriage was raised to inspect the paper. With this in mind, Sholes designed a keyboard less likely to tend towards such clashing and jamming.