How Do I Start Learning Oracle ADF and JDeveloper 11g

http://www.oracle.cc/2010/02/how-do-i-start-learning-oracle-adf-and-jdeveloper-11g/

AP and AR Functional Flow

http://www.aboutoracleapps.com/2007/07/ap-concepts-2.html

Email From PL/SQL In Oracle9i

http://www.oracle-base.com/articles/9i/EmailFromPLSQL9i.php