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Ever Wondered Why Numbers On Phones And Calculators Are Opposite?

Interesting question, eh?

Phones have 1-2-3 on the top row, whereas calculators have 7-8-9 on the top row. Why is it so? Why was this pattern preferred? Is there any psychological reason behind it? Read on to find out.

Ever Wondered Why Numbers On Phones And Calculators Are Opposite?

Ever Wondered Why Numbers On Phones And Calculators Are Opposite?

754 396
  in Science & Technology

Rotary telephones were invented in the US during the early 1900s.

Rotary telephones were invented in the US during the early 1900s.

The holes in the phones were numbered 1-9 with 0 after 9.

By the 60s, keypad phones were invented.

By the 60s, keypad phones were invented.

Before push-button phones were officially released...

Before push-button phones were officially released...

... studies were conducted on how to arrange the numbers, so as to reduce the chances of error while dialing.

Journal of Applied Psychology says...

Journal of Applied Psychology says...

"People arrange numbers and letters in (the) order in which they normally read."

The companies realized that there would be so many combinations of arrangements of numbers like...

The companies realized that there would be so many combinations of arrangements of numbers like...

9^9 possible combinations.

Yes, there were many combinations, but they tried the logical ones the customer would expect.

Yes, there were many combinations, but they tried the logical ones the customer would expect.

In 1960s, Bells Lab conducted a study...

In 1960s, Bells Lab conducted a study...

...which said that people preferred a design that involved two rows of buttons horizontally placed. Apparently, those were the fastest and produced the least amount of dialing errors.

In 1967, Texas Instruments made its first handheld calculator prototype.

In 1967, Texas Instruments made its first handheld calculator prototype.

They installed button that had the order 7-8-9 on the top row. This pattern was inspired by desktop adding machines of the past.

Now, there were 2 standardised patterns and people got used to it.

Now, there were 2 standardised patterns and people got used to it.

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