SAP Gateway Cache is new option to handle access to big amount of data. Because RFC call can take a long time to execute the different Operation CRUD ( Create, Read, Update and Delete). This new Caching functionality so-called Soft-State enable caching the RFC returns and avoid a new call. A typical use for SAP Gateway Cache is Pricing calculation.
SAP TAO stands for SAP Test Acceleration and Optimization. Test Acceleration and Optimization supports SAP customers in accelerating the creation of automated test cases for SAP solutions.