Why does a computer number pad go down from 7-4-1 while a phone goes down 1-4-7?
There was actually a lot of research conducted into the design of the telephone keypad. The results were published in the paper [Human Factors Engineering Studies of the Design and Use of Pushbutton Telephone Sets](_URL_3_). Basically, it was found that the current keypad arrangement had signific…
The Short Answer
There was actually a lot of research conducted into the design of the telephone keypad. The results were published in the paper [Human Factors Engineering Studies of the Design and Use of Pushbutton Telephone Sets](_URL_3_). Basically, it was found that the current keypad arrangement had significantly shorter keying time. The paper does note that "the arrangement frequently found in ten-key adding machines was not the best of the first three arrangements compared". I would speculate that the telephone layout was better for the lay person who wasn't a trained/experienced data operator (and therefore used hunt and peck method of key selection) and that the Rule of Small Numbers doesn't apply to telephone numbers so there were no efficiencies to be gained there.
Analysis
Key Concepts: Telephone, design, keypad
This explanation focuses on telephone, design, keypad and spans 124 words across 5 sentences. At 65% above the average Technology explanation (75 words), this is one of the more thorough answers in this category, reflecting the complexity of the underlying question.
What This Answer Covers
The explanation opens with: “There was actually a lot of research conducted into the design of the telephone keypad.” It then elaboratesultimately building toward a complete picture across 5 connected points.
How This Compares in Technology
Ranked #86 of 500 Technology questions by answer depth (top 18%). This places it in the comprehensive tier — the top quarter of most thoroughly answered questions. Questions at this depth typically involve multi-faceted topics requiring nuanced explanation.
Frequently Asked Questions
Is there a simple explanation for why a computer number pad go down from 7-4-1 while a phone goes down 1-4-7?
There was actually a lot of research conducted into the design of the telephone keypad. The results were published in the paper [Human Factors Engineering Studies of the Design and Use of Pushbutton Telephone Sets](_URL_3_). Basically, it was found…
How detailed is this explanation compared to similar Technology questions?
This is one of the most thorough answer at 124 words, ranked #86 of 500 Technology questions by depth. The key concepts covered are telephone, design, keypad.
What approach does this answer take to explain a computer number pad go down from 7-4-1 while a phone goes ?
The explanation uses scientific references across 124 words. It is categorized under Technology and addresses the question through 1 analytical lens.