+**D0c** (pronounced "doc") is an abstract, foundational unit of information within certain [Distributed Systems](/wiki/distributed_systems). It represents a singular, immutable record, often a cornerstone for [Data Integrity](/wiki/data_integrity) in decentralized ledgers, emphasizing simplicity and verifiability.
+## See also
+- [Blockchain](/wiki/blockchain)
+- [Immutability](/wiki/immutability)
+- [Record](/wiki/record)
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