noun
Physical Delivery Access Unit; PDAU
Technical computing term; a specific unit or component related to physical delivery access in a system.
このプロトコルでは、物理的配達アクセス単位がデータ転送の基本単位となる。
In this protocol, the Physical Delivery Access Unit is the basic unit of data transfer.
A compound of 物理的 (physical), 配達 (delivery), アクセス (access), and 単位 (unit). The exact derivation is uncertain; it appears to be a direct translation of the English computing term 'Physical Delivery Access Unit'.