Know why Calculator Buttons are Downward Up

nkleet (51)in #technology • 6 years ago

You must have paid attention to this fact that on calculator's keypad, all numbers are downside up. In mobile, numbers are given in top to bottom order. But "0" remains at same place, which is down. Do you know, why is it so? Old mechanical cash register designers used to think that the numbers which are used much should be kept down. That is why 0 is kept down in each machine. Additionally, other nos. also written from down. At that this thought was in designers mind to have a look at once on the number. If you see at calculator of your computor, there as well, numbers are given in down to up direction, just like calculator. Later, when caculator was invented, they adopted this method as it is. That is why, today as well, all numbers are written in calculator from down to up.