携帯プレーヤー
http://www.watch.impress.co.jp/av/docs/20051019/creat.htm
http://dc.watch.impress.co.jp/cda/accessories/2005/10/19/2523.html
http://www.watch.impress.co.jp/av/docs/20051018/pana1.htm
http://it.nikkei.co.jp/business/column/data.aspx?i=20051018aj000aj