Links
Great German ABAP site which offers lots of links into the SAP world: www.4ap.de
The fans of SAP: www.sapfans.com
Some other nice links to challenging topics:
ICC – play online chess even against grandmasters
(and try ‘Kriegspiel’ (wild 16)): www.chessclub.com
Tim Krabbé’s chess curiosities
Ingenious contrabass player from Japan: Adagio
Calculator for the 3n+1 problem