Control unit
State: open/active
Definition
Section titled “Definition”A chosen set of modules managed as one thing: one planning directory, one outside view, one set of rollups.
Contrast
Section titled “Contrast”Not a directory with no planning root of its own.
A control unit can be smaller than the structure suggests (one package, several code modules) or larger (a suite of several packages and apps planned as one unit). Moving a boundary is a declaration change, not a code move.