Question

what do you means by std​

Answer 1

Answer:

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Explanation:

Subscriber trunk dialling ( STD, also known as subscriber toll dialing) is a telephone system allowing subscribers to dial trunk calls without operator assistance. The term was introduced when it first became possible for long-distance calls to be dialed directly, and is now rarely used where calls to any destination can be dialed.

Answer 2

std is an abbreviation for sexually transmitted disease
it refers to diseases one can get/can be transferred by sexual interaction