软件开发者常常将二维码放在他们的网站上，这样用户就可以扫描电脑屏幕上的二维码轻松安装他们的应用程序了。

Software developers often include QR codes on their website, so users can install their app easily by scanning the QR code on the computer screen.

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电脑会把针对不同网站的多个用户名及密码存储起来，指纹扫描装置校验了用户的身份后，电脑马上自动把用户名、密码填进去。

Multiple user names and passwords for different websites are stored by the computer, which fills them in automatically once the user's identity has been verified with a finger-scan.

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公司的电脑已经扫描了230亿张照片，这些照片来自于安装了该软件的用户，同时用户也已授权公司查看他们以及他们朋友的照片。

The company's computers have scanned 23 billion photos from people who have installed the app and authorized it to look at their pictures and ones from friends.

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