论文部分内容阅读
联机检索市场是以联机检索服务为依托的信息市场。所谓联机检索,是指联机检索者(最终用户或提供代检服务的联机检索中间人)利用终端设备,通过远程通信线路,运用一些特定指令和检索策略,直接查询联机检索系统的数据库的过程。 联机检索系统一经出现便很快被投入了商业的信息营销活动,从而促使了早期联机检索市场的萌芽。 1972年,美国DIALOG系统(由洛克希德导弹与空间公司创立)率先以仅有的NTIS和ERIC两个数据库开始向信息用户提供商业化的联机检索服务活动。随着营销活动的开展和市场规模的不断扩大,DIALOG系统发展很快。据统计,1972年该系统刚开始商业化服务时,资产仅50万美元,到1988年,当其所有权被出让给knight—Ridder公司时,资产已猛增至3.53亿美元。目前,该
Online search market is based on online search service-based information market. The so-called online search refers to the online searchers (end-users or online search intermediaries to provide agency services) using terminal equipment, through the long-distance communication lines, the use of specific instructions and retrieval strategies, direct query online retrieval system database process. The emergence of an online search system quickly became commercially available as an information marketing initiative that spurred the early online search market. In 1972, the U.S. DIALOG system (founded by Lockheed Missile & Space Company) was the first to begin commercial online search service activities for information users with only two databases, NTIS and ERIC. With the development of marketing activities and the ever-expanding market size, the DIALOG system has developed rapidly. According to statistics, in 1972, when the system started commercial service, the assets were only 500,000 U.S. dollars. By 1988, the assets had soared to 356 million U.S. dollars when it was sold to knight-Ridder. Currently, that