For example, the top 50 websites in the us on average installed 64 pieces of tracking technology onto the computers of visitors, usually with no warning.

例如，全美最大的50家网站平均在访问者的电脑上安装了64种追踪技术，而且通常都没有任何警告。

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We can put tracking tools on the attackers' computers so we know who they are, where they are coming from, where they are going and when they are doing it.

我们可以在攻击者的电脑上安装追踪软件，以此了解他们是谁、从哪里来、去哪里、什么时候会展开攻击。

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Tracking companies can use this data to uniquely identify computers, cellphones and other devices, and then build profiles of the people who use them.

在线追踪公司可根据这些数据为每台电脑、手机或其它电子设备建立唯一的数字身份，并以此建立使用者的档案。

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As before, agency powers sit at a bank of computers tracking Bourne (who may be a thousand miles away) while he tries to evade their gaze as well as the goons, some working for the C.

NEWYORKER: The Bourne Ultimatum

Westin says that computers with tracking programs are found more than 90% of the time.

FORBES: Most Stolen Electronics

It has deals with companies such as Dell and HP to embed its tracking agent into their computers' boot-up software, where it is more difficult for a thief to remove than from the hard drive.

FORBES: Magazine Article