d924f03e_sselaer_Data_Warehouse_Project__data_warehousing_systems
[operational systems] Operational systems are generally designed to support high-volume transaction processing with minimal back-end reporting. [data warehousing systems] 
Data warehousing systems are generally designed to support high-volume analytical processing (i.e. OLAP) and subsequent, often elaborate report generation.
Operational Systems vs. Data Warehousing - Rensselaer Data Warehouse Project
data warehousing systems