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What’s a Linux?

Firstly I must say what an excellent article from Mike Bedford on controlling real-world hardware on your PC. Will he be doing a follow-up ? If you’re looking for ideas, how about interfacing with devices over Wi-Fi? Hopefully, that doesn’t look too much like an article for an electronics magazine, because I guess now we’ve been shown how to send and read ones and noughts, the emphasis shifts to electronics.

Turning to the main point of my letter: why didn’t you cover the architecture (if that’s the right word) of a Linux machine as part