ABAP Gateway
SAP NetWeaver Gateway is a development framework, which is available as an SAP NetWeaver Application Server ABAP (AS ABAP) add-on, which you can install on top of your existing SAP Business Suite or application platform. SAP NetWeaver Gateway offers development and generation tools to create OData services to a variety of client development tools. Put simply, it establishes a connection between SAP Business Suite data and target clients, platforms, and programming framework.
For more information please refer to SAP NetWeaver Gateway area on help.sap.com.