Of course the first thing to know is what is an embedded device, the definition of an embedded device is generally a non-general-purpose PC device.
WinCE is a kind of Windows embedded operating system, not strictly speaking, can be regarded as the windows of the reduced version; similarly, Linux embedded operating system can also be regarded as a PC running on the linux operating system of the reduced version.
Now a lot of aerospace instruments, medical equipment, etc. are using Linux embedded operating system. Powerful networking capabilities and open source easy to access and cut code are its features.
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