Places where people or vehicles are inspected or stopped for inspection, or stages in a process where progress is evaluated.
Compound of 'check' (to examine) and 'point' (location). Emerged as a military term in the early 20th century, then became common in computing and business.
Checkpoints divide the world into before-and-after zones, which is why they're so psychologically powerful—they mark transitions from freedom to scrutiny or safety to danger.
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