Why are telephone numbers seven digits?
A) seven digits is the capacity of short-term memory
B) that is the number of bytes a computer can handle in one millisecond
C) it is a tradition started by the first telephone operator
D) it is the capacity of sensory memory

Question

Quizplus · Accepted Answer

The capacity of short-term memory is typically around seven items, so telephone numbers were designed to be seven digits to be easily memorable for people.

Why Are Telephone Numbers Seven Digits