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-rw-r--r--challenges.mdwn4
1 files changed, 2 insertions, 2 deletions
diff --git a/challenges.mdwn b/challenges.mdwn
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+++ b/challenges.mdwn
@@ -19,8 +19,8 @@ successful true multi-server [[microkernel]] system for general-purpose desktop
use yet. This is still an ongoing research effort. Also the Hurd is not the
only multiserver operating system. Other examples include:
[[Genode OS|https://genode.org/]] (FOSS), [[MINIX 3|https://www.minix3.org/]] (FOSS),
-[[HELON OS|http://www.helenos.org/]] (FOSS), and [[QNX|https://blackberry.qnx.com/en]]
-(proprietary).
+[[HELON OS|http://www.helenos.org/]] (FOSS), [[Redox OS|https://www.redox-os.org/]],
+and [[QNX|https://blackberry.qnx.com/en]] (proprietary).
Likewise, [[resource scheduling|open_issues/multiprocessing]] in distributed operating system kernels is a
research topic. The GNU/Hurd also has