在过去的几十年内，它尽管受到来自光盘、电子书、可在线搜索的数据库的挑战，却仍然是获取知识的最受欢迎的方式。

Though challenged over the last decade by the CD-ROM, eBook, and searchable online database, books remain the most popular way to acquire knowledge.

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数据库被盗的大量事例：装满社会保障数据的光盘的丢失，装有纳税记录的笔记本电脑被落在了出租车上了。

Examples abound of databases being stolen: disks full of social-security data go missing, laptops loaded with tax records are left in taxis, credit-card Numbers are stolen from online retailers.

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第三个版本是电子版，之前以只读光盘出版，现在，在电子数据库也有。

The third edition is an electronic edition published previously as a CD Rom and now available as an electronic database.

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