АМОРТИЗАЦИЯ http://ru.wikipedia.org/wiki/%D0%90%D0%BC%D0%BE%D1%80%D1%82%D0%B8%D0%B7%D0%B0%D1%86%D0%B8%D1%8F_(%D0%B1%D1%83%D1%85%D0%B3%D0%B0%D0%BB%D1%82%D0%B5%D1%80%D0%B8%D1%8F)