Better ask Master:
http://www.research.att.com/~bs/bs_faq.html#oop

>Kindly tell me in brief that " impct of OO paradigm on software development (programming)"
The positive impact is that people are now (more or less) unwittingly using good design practices where those same practices were largely ignored by the masses before OO became all the rage. The negative impact is that OO has become a magic word that drives people crazy.