This does not have to be the case, however. By using some special notation we can redirect the output of many commands to files, devices, and even to the input of other commands.

这个输出并不是唯一的，就是说，我们可以使用一些特殊的符号，将很多命令的输出结果重定向到文件，设备，甚至作为其他命令的输入。

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The selection box identifies the MIDI input or output devices available to the application.

选择框表明MIDI输入设备或输出可用于应用程序。

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DRBD permits the verification of local and peer devices in an online fashion (while input/output occurs).

DRBD 允许对本地和远程对等设备进行联网验证（在输入/输出发生的同时）。

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So far the group has tested touch screens, mobile phones running the Windows Mobile and Android platforms, speech input and output devices and an ordinary domestic TV set with a simplified remote control to run the UCH.

BBC: EU smart-home concept shown off

MIDIConnect adds a MIDI input and output to iOS devices.

ENGADGET: Griffin's MIDIConnect now available at $80 to make beautiful music with your iDevice (video)