The first term used to describe the distribution of multiple computers throughout an organization in contrast to a centralized system. Distributed processing was coined in the 1970s when minicomputers replaced terminals connected to a central mainframe.
The terms distributed processing, "distributed computing" and "decentralized processing" are used synonymously. See distributed computing
In the 2020s, the distributed processing term was resurrected to refer to the "distributed ledger" architecture of blockchain-based cryptocurrencies and smart contracts. See blockchain