A small book issued by a bank to depositors showing their account transactions, balance, and deposits over time; now largely replaced by electronic statements.
From 'bank' plus 'book,' a straightforward compound describing the physical ledger banks provided to customers for tracking their accounts before digital banking.
Bankbooks are artifacts of the pre-digital financial world—the very existence of this object shows how much banking has changed; now all that information exists as bits in cloud servers rather than handwritten entries in a pocket-sized book.
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