This is all about how to create package in ABAP .The concept of package is implemented in ABAP Workbench using tool called Package Builder tool . Packages are designed to allow developers to do 3 main things.They help to modularize, encapsulate, and decouple units in the R/3 System. This Package Builder is used to migrate existing development classes to packages .Doing so creates a new tool for developing and maintaining development classes. “The first projects to use the package concept come from the mySAP Workplace area.