Found via an interview with David Foster Wallace https://neugierig.org/content/dfw/believer_interview.pdf
Reviews are mixed, so I am undecided whether I should read it.

Found http://www.maizure.org/projects/decoded-gnu-coreutils/index.html via https://www.gnu.org/software/coreutils/#source
Recommended reading: http://www.maizure.org/projects/printf/index.html

The HP 48 object listed below in ->ASC form is a high-performance polynomial root finder. Those of you who remember the HP 71B Math Pac will recognize this as the same as the PROOT command from that Pac; it is in fact the same assembly-language code, given an RPL front end to operate in the HP 48.
Found on https://www.hpmuseum.org/forum/thread-10967-post-160700.html#pid160700
See also http://www.jeffcalc.hp41.eu/emu71/mathrom.html#src for the uncommented source code of PROOT and other functions of the HP71B math pack.

Found on Sacha Chua's blog https://sachachua.com/blog/2022/04/2022-04-18-emacs-news/

Source Code for MATLAB (1982-05-25)
A matrix computation System.

Written in FORTRAN by:

Cleve Moler
Department of Computer Science
University of New Mexico
Albuquerque, NM  87131

Source code distributed by:

Jim Kweeder
Department of Chemical Engineering
Clarkson University
Potsdam, NY  13676
Internet:  kweeder@sun.soe.clarkson.edu
Bitnet:    kweeder%sun.soe.clarkson.edu@clutx

Found via the Wikipedia page about Optimum "L" filters
https://en.wikipedia.org/wiki/Optimum_%22L%22_filter

Not only older issues of the Numerical Recipes books, but also classics such as
Handbook Abramowitz and Stegun, Handbook of Mathematical Functions (10th corrected printing, 1972)

Bateman, Erdelyi et al. (Bateman Manuscript Project)
Higher Transcendental Functions (vols. 1, 2, and 3)

and
Encyclopaedia Britannica the great 11th Edition (1911)

Found via https://www.hpmuseum.org/forum/thread-16251-post-142741.html#pid142741

Sounds like an interesting book. See Keith Devlin's review https://www.maa.org/press/maa-reviews/uncle-petros-and-goldbachs-conjecture

Interesting blog written in org-mode, using https://github.com/bastibe/org-static-blog, written by Bastian Bechtold https://bastibe.de/
Some highlights:
https://jao.io/blog/2020-02-26-literate-programming.html literate programming
https://jao.io/blog/2020-02-23-signel.html, a barebones signal chat on top of signal-cli, written in literate style
https://jao.io/blog/2006-03-17-programmers-go-bananas.html category theory
https://jao.io/blog/2020-05-01-dancers-at-the-end-of-time.html sounds like an interesting book.
https://jao.io/blog/2006-07-06-geometrically-speaking.html geometric proofs, Kindergarten Quantum Mechanics
https://jao.io/blog/2020-05-04-observatory.html Mozilla Observatory to check a website's security
https://jao.io/blog/2022-06-19-simple-note-taking.html simple note taking