Multiple instances of something being copied or repeated exactly.
From Latin 'duplicatio' (a doubling), derived from 'duplicare' (to double). The suffix '-tion' forms nouns from verbs, and '-s' makes it plural. The meaning evolved from the literal act of doubling to any repetition of information or material.
In computer science, duplications are actually the enemy—they waste storage space and create maintenance nightmares. That's why programmers obsess over something called 'DRY code' (Don't Repeat Yourself), which fights duplications by reusing code instead of copying it.
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