Multiple choice general knowledge

When and where was STD dialing introduced

  1. Chicago - 1939

  2. Britian - 1959

  3. Delhi - 1969

  4. Australia - 1937
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Subscriber Trunk Dialing (STD) was first introduced in Britain in 1959, allowing callers to dial long-distance numbers directly without operator assistance. This system revolutionized telecommunications and was later adopted by many countries worldwide. The system used area codes that callers had to dial before the local number.

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