# Specialized States

- [CRUD Service](/devops/microservices/elements/state-managers/specialized-states/crud-service.md): This state manager (com.rierino.state.manager.CRUDStateManager) uses a remote REST service as a data store and source, converting state changes and requests to CRUD calls.
- [Odata Service](/devops/microservices/elements/state-managers/specialized-states/odata-service.md): These state managers (com.rierino.state.manager.odata2.OdataStateManager and com.rierino.state.manager.odata4.OdataStateManager) use a remote Odata service as a data source.