Publish and Subscribe (Mac OS)

Publish and Subscribe was a document linking model introduced by Apple Computer in System 7. Named the Edition Manager in developer documentation, it extended the existing cut and paste editing model with a notification system; "subscribers" could include parts of "published" documents within themselves, and changes to the original published document would be noticed and updated by the subscribers.

Source: Wikipedia — Publish and Subscribe (Mac OS) (CC BY-SA 4.0)