The American Industrial Hygiene Association’s 2007 Conference and Expo will be held in Philadelphia. New in 2007 will be 57 roundtable discussions on a variety of topics; 25 new professional development courses; a NIOSH pavilion with audiology demos; an undergraduate student poster session; and more. “Back by popular demand,” according to AIHA, will be the nanotechnology symposium, scientific research symposium, unsolved IH mysteries and more.