This is worth pondering, since the numbers that had to be entered on such machines, representing certain sums of money, contained many zeros, which made the 0 key, which was most often pressed. There is an opinionaccording to which calculators are designed on the model of cash registers. It should be noted that these "ideas" still do not give us an explanation of why modern calculators use the keyboard with the reverse arrangement of numbers from 9 to 0. Such an approach differs from that used in the Pascal summing machine or in the calculator for Thomas de Colmar. This interface allows users to focus on working with the input device, without requiring them to interact with the internal mechanisms of the machine. White machine, even if it existed only on paper, may well be considered the earliest example of a modern interface with direct control. The keyboard of the counting device described by James White, 1822 The This machine used the world's first numeric keypad, which is a single row of keys with numbers from 1 to 9 on them. The year of the appearance of the keyboard can be considered 1844, when the Frenchman Jean-Baptiste Schwilge created the first working prototype of a calculating machine with a keyboard. And some inventors have already started experimenting with piano-like machines in the late 18th century. The keyboard appeared roughly between the first and second industrial revolutions (between 18).
Once I looked at the keyboard and I wanted to know when, in the history of cars, the use of keys began. Typewriters, cash registers and calculators Going deeper into history, we will be able to find out which device was first invented, which keyboard influenced the other, and, more importantly, who first came up with the numeric keypad. I believe that the answer to the question about the reasons for the differences in digital keyboards will help to find the history of the evolution of the devices with which they were supplied. Someone might try to explain the difference between them with ergonomic considerations. Perhaps the keyboard looks like this because of the patent struggle between the inventors. Common sense suggests that some technological limitations have played a role. Working with these keyboards looks exactly the same, so the reason for their differences is not quite clear.
Phone keypad (left) and calculator keypad (right)Īs you can see, there is an insignificant but mysterious difference between these keyboards, given that they serve the same purpose - the input of numbers.
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