Learn about LVM snapshots and use them for my backups.
Found on the tarsnap page https://www.tarsnap.com/snaptime.html

Technique to extend bandwidth invented at Tektronix, found on https://w140.com/tekwiki/wiki/Bridged_T-coil

Found on An Engineer's View - Applying logic, science and common sense, https://www.cosjwt.com/reading-modem-status-registers-in-ubuntu-linux/

"Jay Logue has an awesome set of tools using the user space file system support: FUSE for Linux and MacOS: https://github.com/jaylogue/retro-fuse which support UNIX v6, v7 and 2.9BSD filesystem formats." is intriguing.
Not directly related, but the links to SDF's interim computer museum in https://groups.google.com/g/pidp-11/c/NR_EUdMj3cI/m/Phu3neBrAQAJ are interesting too.

Links to stories about the TENEX and TOPS-20 operating systems

The description below sounds intriguing.
In numerical analysis, the ITP method, short for Interpolate Truncate and Project, is the first root-finding algorithm that achieves the superlinear convergence of the secant method[1] while retaining the optimal[2] worst-case performance of the bisection method.[3] It is also the first method with guaranteed average performance strictly better than the bisection method under any continuous distribution.[3] In practice it performs better than traditional interpolation and hybrid based strategies (Brent's Method, Ridders, Illinois), since it not only converges super-linearly over well behaved functions but also guarantees fast performance under ill-behaved functions where interpolations fail.[3]

The LOCKSS Program at Stanford Libraries provides open-source technologies and services for high-confidence, resilient, secure digital preservation.
Found on David Rosenthal's blog https://blog.dshr.org/2024/01/a-lesson-learned.htm

The references look interesting.