Workflows are used to automate processes. When a first workflow is performed, it may invoke a set of one or more nested workflows, workflows in other applications or services in other applications. The first workflow can be configured to pause and wait for the invoked set of one or more nested workflows, workflows in other applications, or services in other applications. Alternatively, the first workflow can be configured to proceed without waiting. Various means are disclosed for re-staring the first workflow and providing data back for the first workflow.