Design pattern

http://www.mindspring.com/~mgrand/pattern_synopses.htm

http://www.kyobobook.co.kr/category/bookdetail/BookDetailView.jsp?CLICK=FRE&NEWCLICK=IA1&BKIND=ENG&CATE=&BARCODE=6100201633619&FLAG=0&PRE_QUERY=%28DESIGN%3Cand%3EPATTERN%29%3Cin%3E%28total%29&QUERY_TEXT=&PRE_QUERY_TEXT=design+pattern&REQUERY_CHECK=&CLASS_CODE_CHECK=&PAGENUM=START&PAGE_CLICK=&INITIAL=&INITIAL_CLICK=&INITIAL_QUERY=&TOTAL_CHECK=&BEST_CHECK=&TOP_CHECK=&TOP_FIELD=&ADD_FIELD=&QUERY=&EJK

http://en.wikipedia.org/wiki/Software_design_pattern