传统图书馆的资料收藏以印刷出版物和手稿为主，并存有电影胶片、照片和唱片及录音材料。近20年来，录像带、录音带、缩微胶片和电脑光盘《CD—ROM）等影音资料和电子资料也大量进人图书馆的收藏目录。然而，给传统图书馆带来真正巨大冲击与震撼却是90年代中后期因特网的飞速发 The traditional library’s collection of information is mainly printed in publications and manuscripts and includes motion picture films, photographs and recordings and recordings. For nearly 20 years, video and audio materials such as videotapes, audio cassettes, microfilms and CD-ROMs, and electronic data have also entered the library’s catalog in large numbers. However, the real impact and shock to the traditional library were the rapid development of the Internet in the mid-to-late 1990s