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AI Summary
- ZIP codes originated after WWII as a mail organization system but have become ubiquitous in modern life, appearing in credit card verification and rental searches.
- The ZIP code system contributes approximately $10 billion annually to the US economy and has expanded far beyond its original postal purpose.
- The episode explores why ZIP codes were created, how they transformed mail delivery, their broader economic and social impact, and whether their current usage has overreached.