A metric prefix meaning one trillion (10^12) times the base unit, commonly used in computing and science.
From Greek 'teras' meaning 'monster' or 'marvel', adopted in 1960 for the International System of Units. The choice reflects the 'monstrous' size of the quantities being measured.
A terabyte of storage seemed impossibly large when the prefix was coined, yet today's smartphones routinely store multiple terabytes, showing how human perception of 'enormous' quantities constantly shifts with technological advancement.
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