That's one reason why you don't use your primary e-mail account for most online commerce and instead let companies store a less valuable address in their databases.

这就是为什么你不使用私人邮件地址用于大部分的网上电子商务，而是给个次要的邮件地址让这些公司保存到数据库去。

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During this process, the use of information technology including: Internet, Extranet, e-mail, databases, electronic directories and mobile phones.

在此过程中，利用到的信息技术包括：互联网、外联网、电子邮件、资料库、电子目录和行动电话。

youdao

Customers use FAST to search billions of public Web pages and hundreds of terabytes of e-mail, databases and documents behind their firewalls.

FORBES: The Finder