https://studylib.net/doc/25540152/this-document-is-a-preview-generated-by-evs
ISO 22900-2 standard for road vehicles, detailing the Modular Vehicle Communication Interface (MVCI) and Diagnostic Protocol Data Unit (D-PDU) API.
protocol data unitroad vehicleisodiagnosticapi
https://www.semanticscholar.org/topic/Smart-card-application-protocol-data-unit/962814
In the context of smart cards, an application protocol data unit (APDU) is the communication unit between a smart card reader and a smart card. The structure...
protocol data unitsmart cardsemantic scholarapplication