This is technically a bit of a spoiler for the book, but a) a lot of them are not in the book, and b) the book comes out in half a year, and we’ll all forget by then!
Let’s start!

@mwichary this was TI's way of attempting to provide dedicated letter keys for programming while also evading American standardized tests' rules about what is considered an allowable "calculator" and what is an illegal "computer"
their later revision of this model has a rearranged keypad with the letter keys all together at the bottom, but notice that they're not in QWERTY order, one of the preconditions for being considered a "computer"
@mwichary wow! I just saw a video where Penn Jillette was wearing this exact watch!
https://youtube.com/clip/UgkxXw6obbMlEwgglS-DHq5chgFoogGZuTO7
55 seconds · Clipped by Brian Fitzpatrick · Original video "The Unpleasant World of Penn and Teller E01" by VHS Video vault
@mwichary Don’t knock the circuit stylus until you’ve tried a #Stylophone analog #synthesizer: https://stylophone.com
#synthodon #keyboard #MusicalInstrument #ElectronicMusic #Dubreq #DavidBowie #Bowie #JohnLennon #Kraftwerk #RolfHarris #SmallFaces #Orbital #Pulp #BabyDriver
@mwichary The long dark tea-time of #Commodore clawing for relevance in a world where the popular market couldn’t see past the flood of #PC clones to their struggling #Amiga machines. Jack Tramiel knew how to fight a price war, but he was forced out and took over #Atari to seek revenge. Both companies ended up fighting over niches and scraps.
@mwichary I think Doug would have enjoyed your *augmentation*. He believed in BOOTstrapping after all.
(I got to spent a few hours with him once in Menlo Park)
In case you never came across it, a nice ACM puzzle I read once:
Explain why a keyboard lets Doug* log in when sitting down but not when standing up.
*I've forgotten whom originally
Pause here.
Answer:
Keycaps moved (prank) + touch typing when seated & two fingers when standing, not looking & looking respectively.
I use one of these for some hot keys for myself. Can’t beat a good arcade button. https://store.djtechtools.com/products/midi-fighter-spectra