Upspin sounds interesting.
There are other interesting articles, for example
https://commandcenter.blogspot.com/2019/01/notes-from-1984-trip-to-xerox-parc.html
https://commandcenter.blogspot.com/2018/02/cerns-ipod-like-control-devices-from.html
Ironically, I found this via
https://ambrevar.xyz/links/index.html
where both Kernighan and Ritchie's book "The C programming language" and Kernighan and Pike's "The Unix programming environment" are classified as "Unix books you’d rather not read".

Found via SchemePlanet, where he announced the R6RS Scheme compiler Loko. It targets AMD64, either on bare hardware or under Linux.
Just one interesting example: https://weinholt.se/articles/non-posix-filesystems/

Blog describing many cases where algorithms with quadratic complexity appear, almost always unintentionally.

Abstract: The Breakthrough Starshot project proposes using radiation-pressure propulsion to send multiple spacecraft in the gram-range mass to interstellar targets. There are numerous engineering challenges to accomplishing this mission, but their project discusses speeds and accelerations previously only discussed for cannon projectiles and particle physics experiments. This article examines the problem from first principles to see if the project is even orders-of-magnitude possible. A preliminary check on their numbers seems to confirm that the project is possible in principle.
https://stkwans.blogspot.com/2012/04/program-66.html is about the Apollo guidance computer.
https://stkwans.blogspot.com/2012/09/a-review-of-adxl345-and-bma180.html

This blog is a companion to T J Sawyer's Web Page that outlines the history of the Burroughs Datatron 205 [1]
and Paul Kimpel's incredible 205 [2] and 220 [3] emulators.
Found on Cleve Moler's blog
https://blogs.mathworks.com/cleve/2017/10/09/my-first-computer-the-burroughs-205-datatron/

[1] http://tjsawyer.com/B205Home.php
[2] http://www.phkimpel.us/ElectroData-205/
[3] http://www.phkimpel.us/Burroughs-220

Blog about computer history, describing the source of cat(1), Lisp, RSS, Ada Lovelace's first program and more.

Interesting information about ssh{d} on Ubuntu touch.

Klipse https://github.com/viebel/klipse
allows to interactively edit and run programs written in
Common Lisp, javascript, clojure[script], python, brainfuck, scheme
in a Javascript-enabled web browser.
Ironically, it does not seem to work with Firefox 52.6.0 (64-bit)/Windows 7.

Blog article about using the simulated keys of the Emacs X Window Manager (EXWM) to change keymaps of programs such as Mozilla Firefox.

Blog mostly about the network time protocol (NTP).