A week with Plan 9

I spent the first week of 2021 learning an OS called Plan 9 from Bell Labs. This is a fringe operating system, long abandoned by its original authors. It's also responsible for a great deal of inspiration elsewhere. If you've used the Go language, /proc, UTF-8 or Docker, you've used Plan 9-designed features. This issue dives into operating system internals and some moderately hard computer science topics.

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