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CD(计算机光盘)是近年来国际上最新的科研成果之一。它是一种图、文、声并茂的信息载体。作为文献资料存储载体的《只读激光盘片数据库》,即CD-ROM(CD-Read on ly Memonaly)应用于医学文献检索系统只不过2～3年。由于CD-RoM的最大存储容量可为6亿个印刷字符,所以它足以编制各种资料库。目前美国国立医学图书馆编制的MADLARS(医学文献分析和检索系统)已转录到CD-RoM上称为MEDLINE CD-ROM。美国MEDLINE每年收集约25～30万篇文献(其中50～60％有摘要)均可收纳在一张
CD (Computer Disk) is one of the latest international scientific research achievements in recent years. It is a kind of information carrier with pictures, texts and sounds. The “Read-Only Laser Disc Database”, a CD-ROM (CD-Read on ly Memonaly), used as a storage medium for documentary data, was applied to a medical literature retrieval system for only 2 to 3 years. Since CD-RoM has a maximum storage capacity of 600 million printed characters, it is sufficient to compile various databases. The current MADLARS (Medical Literature Analysis and Retrieval System) compiled by the National Library of Medicine has been transcribed on the CD-RoM as the MEDLINE CD-ROM. US MEDLINE collects about 250,000 to 300,000 documents each year (50 to 60% of which are abstracts)