This place is most things about SAP.
It's DAVID's knowledge base to summarize his knowledge of SAP during work.
If you also wanna build it to share your knowledge togerther with me here, please just mail blueoxygen at gmail.com.

• whether a particular day is a non-working day
• Download internal table into EXCEL
• Output ICON
• sap Program DEMO info
• SAP Program's unit test