メモ:データ抽象化
http://kaiunix.cs.shinshu-u.ac.jp/Lesson/ProgLanTh/2004/oo_history.html
http://kakugawa.aial.hiroshima-u.ac.jp/lecture/1999/Prog/ln/lectP3a.html
http://www.saiensu.co.jp/books-htm/ISBN4-7819-0712-1.htm
http://www.amazon.co.jp/exec/obidos/ASIN/4817161124/
http://www.s34.co.jp/cpptechdoc/article/adt/
http://www.shoeisha.com/book/pc/20c/chap08/gen.htm