noun
distribution list expansion
Computing term for the process of expanding a distribution list into its individual members, often used in email or groupware contexts.
メール送信時に配布先表展開が自動で行われる。
Distribution list expansion is performed automatically when sending an email.
Compound of 配布先 (distribution destination) + 表 (list) + 展開 (expansion). The exact historical derivation is uncertain; the term is used in modern computing contexts.