Keypads and Touch it pads in phones and calculators or keyboards

yes, these are little things we ignore most of the time. we have been using them yet we are not aware why they are arranged such. there must be reasons for these numeric arrangements. i wish somebody could expound more about this.

you may be right my friend because in the first place, they could have done these things uniformly without any hassles on the part of the users. as you said, the layout designers of these gadgets even confused us than helping us out the easiest way. how would you be more convenient if you are using a cellphone on one hand and a calculator on the other hand or perhaps keying in your numeric keypads of your keyboard for some mathematical operations while pressing the phone number of your friend in your cellphone. what a delightful expereince!

well that would be something else for I have to look at the nos. on each to punch them in I dont have them memorized just my phone nos. are in my head lol or I hit redail

your wish is my command!

I found this answer while I was searching. Mechanical adding machines, based on rotating wheels, always have the 0 button adjacent to the 1 button. By convention, most old adding machines had the numbers increasing in value from the bottom. When the numbers were put onto a pad arranged as a 3 by 3 grid with one left over, the order of the numbers was kept the same. On a rotary telephone dial, the 0 comes adjacent to the 9 because a 0 in the telephone number is signalled by 10 pulses on the line. When telephones acquired push buttons in a grid, the ordering of the buttons was carried over from the old telephone dial.