资讯检索系统简史内容摘要：

網路傳播  Gale Directory of Database  1991— 7,637資料庫、 1,372製作者、 6,261Online  1997— 10,338資料庫、 3,216製作者、 9,662Online  2020— 遠距學習  美國數位圖書館先導計畫  DLInitiative I  DLInitiative II 8 2020 Database marketplace— 1/2  The typical 2020 Database  Most are creatorpublishers  Libraries are more than 75 percent of their market  Academic libraries are the primary market  Nearly 70 percent have recently made an acquisition or formed a partnership  Nearly 90 percent have new products  The web is the most popular delivery mode  Flatfee subscriptions are the most popular pricing option 9 2020 Database marketplace— 2/2  Trends To Watch  Increased direct linking  More databases with full text  More usage information and increased COUNTERpliance  A slow increase in products with perpetual rights  If shrinking library budgets inhibit the roolout of new products 10 2020 Database marketplace— 1/2  The typical 202。
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