论文部分内容阅读
美国化学文摘(简称CA)是世界上著名的检索刊物之一,早已是国际联机检索系统中的一大数据库。随着这几年光盘数据库的兴起,CAS(美国化学文摘社)也出版了CA光盘数据库,分为1987—1991年、1992—1996年的12卷和13卷累积版及1997年到现在的年度版两种。检索系统也有两种版本:一种是在DOS环境下运行的检索系统;一种是在WINDOWS 3.1环境下
The American Chemical Abstracts (CA) is one of the world’s leading search publications and has long been a major database in the international online search system. With the rise of CD-ROMs over the past few years, CAS (American Chemical Abstracts Service) has also published CA CD-ROM databases in 12 and 13 volumes from 1987 to 1991, from 1992 to 1996, and from 1997 to the present Two versions. There are two versions of the retrieval system: one is to run a retrieval system in DOS environment; one is in WINDOWS 3.1 environment