Why are the letters on the keyboard not in alphabetical order? And why on the keys “A” and “O” (in the English layout – “F” and “J”) are there small convex dashes, tubercles? If you also asked these questions, but could not find answers to them, we suggest looking together for explanations for these phenomena.
A modern keyboard is a descendant of a typewriter invented in the 19th century. Due to the design features of the mechanical device, the keys located at the edges of the machine were subjected to additional stress. This forced manufacturers to bring to the periphery of the letter rows the characters that were used the least often during typing. In the future, the keyboard layout was changed several times, with the goal of making it more convenient for typing, which in turn was to increase the speed of typing.
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To do this, using the method of statistical calculation, the most frequently used letters and their combinations were determined – they were transferred to the center of the typewriter. Around these “main” characters are located less used signs. As a result, the layout has acquired a modern look. It, as you probably already guessed, the creators of modern keyboards borrowed from old typewriters.
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So why do we need tubercles on the keyboard keys “A” and “O”?
As for the tubercles on the keys “A” and “O”, here the situation is even simpler. The essence of this mysterious phenomenon is the method of touch typing. The latter suggests that a person will type without looking at the keyboard. This significantly increases printing speed and makes the typing process easier and more efficient. The main feature of the method is that each key is assigned certain keys.
The index fingers of both hands are “responsible” for rows containing the letter “A” on one side and “O” on the other. Since these symbols are the most used, they are taken as a kind of reference point. The typesetter, thanks to the convex dashes on the corresponding keys, can thus find the buttons by touch, without interrupting the printing process. This is the meaning of the notes on the keys “A” and “O”.