SAP Data Warehousing Solution

BW is an end-to-end data warehousing solution.

It uses preexisting SAP technologies. 

BW is built on the Basis 3-tier architecture.

It is coded in the ABAP (Advanced Business Application Programming) language. 

It uses ALE (Application Link Enabling).

It also uses BAPI (Business Application Programming Interface) to link BW with SAP systems and non-SAP systems.