He traced the history of free products from Jell-O's giveaway of billions of free recipe books starting in the '20s to today's free E-mail programs and beyond.

他一一追溯免费产品的历史，从20年代Jell - O果冻所推出的数十亿本免费食谱，到今时今日各项电邮程序的免费供应。

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I sent an E-mail message to a friend telling him about Adblock Plus, an easy-to-use free addition to the Firefox Internet browser that deletes advertisements from Web sites.

我给我的朋友发了一封电子邮件，告诉他firefox浏览器推出了一个免费的Adblock plus(广告拦截插件)，这个插件可以清除网络上的广告。

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So that's what I discuss in this article: The infrastructure issues involved in the transition of game infrastructure providers from the free-spirited arena to the e-business enterprise.

游戏基础结构提供商正在从无拘无束的公司过渡到电子商务企业，本文要讨论的就是在这个阶段中涉及的基础结构问题。

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Sony continues to offer its popular and critically-acclaimed public library lending feature by offering patrons with a valid library card the ability to easily and conveniently borrow free e-books wirelessly from over 15, 000 public libraries in the US via an intuitive, simple-to-use dedicated icon on the device.

ENGADGET: Sony Reader gets a new design, Evernote integration and a free Harry Potter book for $129

He says he didn't foresee the emergence of free e-mail and storage programs from the likes of Yahoo and Google's Gmail.

FORBES: Magazine Article

Publishers fear that if readers realize they can borrow e-books for free from their local library, they might not buy them as much.

FORBES: What Is Going On With Library E-Book Lending?