OC4J and BC4J

Hi All,
What is OC4J and BC4J ?? What is the basic difference between them.
I know there is a lot of documentation on OTN on these, but they are very detailed. I just need to know the basic concept and difference between the two.
Thanks!!
Shalu

about bc4j in general see
http://otn.oracle.com/jdeveloper/help/
about the advantages of bc4j for developing j2ee-applications using MCV-frameworks see
http://otn.oracle.com/products/jdev/htdocs/j2ee_bc4j.html
for general information about j2ee see
http://java.sun.com/j2ee/docs.html
for information about j2ee containers (such as oc4j) see
http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/Overview3.html
hth, trevi sorry for the bad formatting (preview does not work), i try it again:
about bc4j in general see :
http://otn.oracle.com/jdeveloper/help/
about the advantages of bc4j for developing j2ee-applications using MVC-frameworks see :
http://otn.oracle.com/products/jdev/htdocs/j2ee_bc4j.html
for general information about j2ee see:
http://java.sun.com/j2ee/docs.html
for information about j2ee containers (such as oc4j) see:
http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/Overview3.html

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