For most computer users, editing a Microsoft Word document and instant messaging are two very different activities.

对于大多数计算机用户来说，编辑一个Microsoft Word文档和即时通讯消息是两项完全不同的活动。

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Currently these types of input are imprecise because people pronounce and write words very differently, making it difficult for a computer to recognize the same input from different users.

现在这些输入的形式很多是不准确的，因为人们在读写的时候是非常不同的，这就使让电脑识别来自不同用户的同样输入成为了一件很困难的事情。

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Whiteboard is one of important interactive tools based on graphics in Computer Supported Cooperative Work (CSCW). It supports multiple users at different places interact by PCs.

电子白板作为CSCW中的一个重要的图形交互工具，使处于不同地点的用户通过计算机可以实时的进行图形交互。

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Different groups have different estimates, and most don't separate mobile Internet users from those accessing the Web from a computer, even though the two groups face different choices of browsers.

WSJ: Statistically Speaking: Browser Wars Escalate

Like any computer system, Paradiso says X-Reality implementations would require different levels of access based on verifying users' identities.

FORBES: Breakthroughs

Many of us already use what is called 'virtualisation' technology to run different operating systems at the same time, like the Mac users who also have Windows on their computer.

BBC: Staying safe and taking risks