A Simple Overview on SAP HANA

A good and helpfull article discussing the Architecture,In-Memory capabilities and many other interesring ideas of Hana

the article is located the sap articles section,written by Abyson Joseph :

http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/00909dbb-1bc7-2e10-cda7-891e2aaedde5 

Business Objects XI 4.0 New Features - What's New?

A good summarized paper that describes the new features in XI4.0  :

http://www.erphowtos.com/sap-business-objects/20-business-objects-xi-40-new-features-whats-new.html