Kiisu[0], credit card sized footprint computer with modular add-ons.

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[0] : https://github.com/kiisu-io/

Perhaps doing the g-code text as barcoding / q-code sequences might permit more code to be included in book?

Nice light computational module for huds device. Random search engine project pick:[0]

Perhaps also basis for a table coaster 3d hologram[1]

Adding to card thickness / modularity:

   pop-up hologram display.[2][3]

   projected keyboard/display[4] & gain ability to respond to text messages!
   

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[0] : https://www.instructables.com/Smart-Glasses-V2/

[1] : https://www.youtube.com/watch?v=xHbQRcIWxC8

[2] : https://www.youtube.com/watch?v=vRo8m_a6F54

[3] : https://www.youtube.com/watch?v=wM_Byrv9iBI

[4] : https://www.youtube.com/watch?v=gTnHEzshdIQ

?? add relevant wifi/port to connect to a projector/projection glasses / laser projector[0]

3 old micro ibm hard drives combined into rgb color space / diy laser image projector[1] might be able provide a bigger picture without exceeding DIY credit card size. kinda depends on laser size.

Ummm... a smartphone internal projector module more compact than diy stack of ibm microdrives / laser.[2]

Not worrying about size: esp32 laser dac : https://www.youtube.com/watch?v=9YASnlB_t_U

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[0] : diy laser video projector : https://asktheman.xyz/

[1] : https://www.youtube.com/watch?v=fEPicBSYeNQ

    : https://www.youtube.com/watch?v=bl1e54QGJk4

[2] : https://www.youtube.com/watch?v=ET7jP2OsxzA

Ah, quick read / then dissapointment on re-read -- not banking on flexing to get an idea to fly -> https://techxplore.com/news/2026-03-birdlike-robots-greater-...

So, no AI seagul training to do machine banking/swipe money transfers.

cad/stl/cnc related files for 'automated assembly' via 3d printing pcb[1] / pick-n-place machine[2][3] would be nice.

Catchy, higher order point/fundamental theory of calculus application of "Move over cassette tapes, adhesive tape has memory, too"[4]

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[1] : "Making a 3d printed circuit board that works" : https://www.instructables.com/Make-a-3D-Printed-Circuit-Boar...

[2] : pick-n-place machine : https://en.wikipedia.org/wiki/Pick-and-place_machine

[3] : No solder! : https://www.electromaker.io/blog/article/affordable-pcb-prot...

[4] : "Move over cassette tapes, adhesive tape has memory, too" " https://news.ycombinator.com/item?id=48161242

diy 486 schematics (around year 2000)[0]. no longer available. Discription/overview[3]. :( But, current linux doesn't support 486 cpus.

Was turned into something commerical (?2002[2])[1]. Perhaps modern version would be the old AMD cyrix chips?

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[0] : http://boole.stanford.edu/cebit/

[1] : https://megagames.com/news/matchbox-pc-smallest-world

[2] : https://ptacts.uspto.gov/ptacts/public-informations/petition...

[3] : https://www.paloaltoonline.com/morgue/monthly/1999_May_26.MI...

Food for thought:

Add a lambda fuction. Add list of condiments[0] such as let-us.

Forage/prove one can have a turing complete meal with bun? Easier than risking indigestion through bun/sheaf correspondence.[1][2][3][4]

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[0] : https://en.wikipedia.org/wiki/List_of_condiments

[1] : Applied Sheaf Theory for Multi-agent Arificial Intelligence (Reinforcement Learnig) Systems: A prospectus : https://people.cs.uchicago.edu/~ericschmid/schmid-applied-sh...

[2] : Discreate Morse theory for computing cellular sheaf cohomology : https://www2.math.upenn.edu/~ghrist/preprints/computationals...

[3] : https://medium.com/@german_mag.ai/sheaf-theory-and-applicati...

[4] : https://direct.mit.edu/books/oa-monograph/5460/Sheaf-Theory-...

Think that was a early computation thing -> CRT memory[0][1]

Perhaps the 'city block' heaters requiring similar sized AC condensors to provide control over Maxwell's daemon was the inspiration for the unix daemon process.

Optical computing makes fuzzy computations so much easier -> outgassing[2]

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[0] : https://spectrum.ieee.org/the-birth-of-ram

[1] : https://bunkerofdoom.com/lit/CRT-scopes/CRT_memory/index.htm...

[2] : https://spectrum.ieee.org/adhesive-outgassing-nasa-standards

"Can it run DOOM?" : https://canitrundoom.org/