A system design where many modules solve a problem through one shared board.
Blackboard Architecture is like a school project whiteboard. The math kid and the marker hoarder both add clues.
The board keeps the current state, so modules can work together. You meet it in speech recognition and diagnosis.
Expert System
Blackboard Architecture often helps Expert Systems reason together.
KR
The middle results on the board need clear knowledge form.
Production
Rule modules can fire based on the board state.
MAS
Many modules share state and solve the problem together, like agents.