大多数图书馆每年订购为数众多的杂志供读者使用,但是使美国图书馆员感到迷惑不解的是,并不是所有的人都愿意经常光顾图书馆。一些专家认为,与其在难以捉摸的索引上花费数小时而一无所获,不如订购几种核心期刊放在自己的办公室,他们希望能赶在竞争到来之前最先读到热点报导和有关文献,何况图书馆订购的杂志可能会遗失或者出借。读者的这种想法对图书馆员提出了新的课题,借助于现代计算机技术和通讯技术的最新成果,美国Cernell大学于1993年4月建立了第一个电子模拟图书馆——“化学联 Most libraries order a large number of magazines for readers to use every year, but what puzzles US librarians is that not all people are willing to visit the library frequently. Some experts believe it would be better to order several core journals in their own offices rather than spend hours on the elusive index, hoping to catch the hot stories and related literature first before competing, not to mention the library Ordered magazines may be lost or lent. Readers of this idea librarians put forward a new topic, with the latest achievements of modern computer technology and communication technology, the United States Cernell University in April 1993 to establish the first electronic simulation library - ”Chemical Alliance