Learn in the textbookFundamentals of Processing Types and System Configuration
DefinitionCentralized processing (集中処理) is a processing form in which work is gathered on a single computer (a host computer) and handled there in one place.
ExplanationUsers' terminals connect to the central computer, which takes on all data storage and computation. Because management and maintenance happen in one place, operations are easy to keep consistent, but if the central computer fails, the whole system stops.
AnalogyIt is like sorting every parcel in town at one large depot. Nothing escapes notice, but if that depot shuts down, all deliveries stop.