first draft

docs/reference/glossary.md

@@ -149,6 +149,10 @@ The log is comprised of an ordered sequence of records written to persistent sto
 
 - [Partitions](/components/zeebe/technical-concepts/partitions.md#partition-data-layout)
 
+### Management cluster
+
+The management cluster includes Console, Identity, and Web Modeler, existing alongside the orchestration cluster.
+
 ### Manual task
 
 A manual task defines a task that requires human interaction but no external tooling or UI interface. For example, a user reviewing a document or completing a physical task.
@@ -163,6 +167,10 @@ A message contains information to be delivered to interested parties during exec
 
 - [Messages](/components/concepts/messages.md)
 
+### Orchestration cluster
+
+An orchestration cluster includes Zeebe, Operate, Tasklist, and Optimize, existing alongside the management cluster.
+
 ### Outbound Connector
 
 Outbound [Connectors](#connector) in Camunda 8 allow workflows to trigger with external systems or services, making it possible to integrate workflows with other parts of a business process or system architecture.