After you implement your data and business objects, you still have one last task to perform before you can run those objects within MTS: you need to group the components into MTS packages. In this chapter, we'll review what packages are and discuss how to decide which components should be grouped together. We'll also look at how to create packages and how to set attributes that are typically established during development, including security and transaction requirements. In Chapter 14, we'll look at the additional steps the system administrator takes to actually deploy the application.