Blog about Common Lisp, (Quantum) computing. Found via the announcement http://www.stylewarning.com/posts/not-all-elementary/ on https://planet.lisp.org/
His Lisp library for performing extremely fast, extremely high-precision arithmetic https://github.com/stylewarning/hypergeometrica sounds intriguing.

Interesting tools, found via Karl Voit's blog https://karl-voit.at/2026/04/06/Are-we-stuck-with-the-same-Desktop-UX-forever/

On-line Book about FSet, a common lisp library for functional sets.
Announcecd on Planet Lisp https://scottlburson2.blogspot.com/2026/04/fset-v242-champ-bags-and-v10-of-my-fset.html

Found via the Emacs Wiki https://www.emacswiki.org/emacs/pokey

Another static site generator rendering org-mode files.  The function org-element-map is worth investigating, so is the button to switch between dark and light modes.
Found on Sacha Chua's blog https://sachachua.com/blog/2026/04/2026-04-06-emacs-news/

Be careful with git repositories, inspect .git/hooks/payload and .git/config for core.fsmonitor.
Found on Sacha Chua's blog https://sachachua.com/blog/2026/04/2026-04-06-emacs-news/

15-page article belonging to my "Boldly Going" series, this is the original version for the HP-71B of my article "HP Article VA042a - Boldly Going - Outsmarting PROOT (42S)".

Though this article appears at first sight quite similar to the version for the HP-42S published in Update #24, it was actually written earlier and includes additional sections discussing the internal workings of PROOT and their differences, as well as more examples specific to the 12-digit precision available in the HP-71B, which aren't featured in the HP-42S version. Also, it can be very useful for HP-42S users to better understand the RPN version innards, as the BASIC code is much clearer and the algorithm is exactly the same.

The article includes a small 11-line BASIC subprogram PZER (plus an optional driver) for the HP-71B and emulators (Emu71/DOS, Emu71/Win, go71b, etc.) dealing with a glaring limitation of the HP-71B Math ROM’s keyword PROOT, the polynomial root finder which finds at once all real/complex roots of an Nth-degree polynomial but only works for polynomials having real coefficients. On the other hand, PZER works efficiently and accurately for polynomials whose coefficients are real and/or complex, and can work globally (no user inputs or initial guesses required whatsoever, just the coefficients) while also providing the user with extra control if desired. It can be called from your own programs or manually from the command line.

Mentioned on the MoHP forum https://www.hpmuseum.org/forum/thread-24890-post-218543.html#pid218543

Found when searching for HP 5384A Universal Counter

Found via https://quomodocumque.wordpress.com/2026/03/09/the-irrational-decision/