When I came to open an account at the bank, the bank officer looked pale and shocked. What's Bank?

When I came to open an account at the bank, the bank officer looked pale and shocked. What's behind that bank? "The bank was a cathedral of silence. The marble floors were polished to such a high sheen that they looked like frozen water, and the walls were lined with rows of identical, windowless doors. But it was the air that gave it away. It didn't smell like money or paper. It smelled like the deep, static-filled chill of a computer room that had been running for a hundred years without rest. Behind those heavy, reinforced doors, I didn't hear the clinking of coins. I heard the low, rhythmic hum of a million lives being processed, categorized, and—if they didn't fit the program—wiped clean."