I'm not sure how you draw the conclusion that there is no covered app store. Are you sure https://github.com/c3d/db48x/tree/dev/library is not covered, for example? More importantly, are you willing to indemnify me if some lawyer decides to argue that this projects falls under the law and that I should pay $7500 per child using it?

No, I am not ignoring the GPLv3. This is not a license, but a legal notice that residents of these states, by applying the GPL and freely running software that may violate local laws, are the ones that may have to deal with the consequences.

I clarified in a recently updated version of the text, and I refer the readers to this discussion. https://github.com/c3d/db48x/blob/dev/LEGAL-NOTICE.md

This is a valid point, and I was aware of it, though the wording was not clear enough. So I clarified in a recent commit. I also added Brazil and New.

https://github.com/c3d/db48x/blob/dev/LEGAL-NOTICE.md

Exactly

DB48x certainly has a GitHub site with freely downloadable pieces of software that can run on the calculator. For instance here: https://github.com/c3d/db48x/tree/stable/library

Some of these include contributions from third parties.

The problem is that the law is written without a precise enough wording that would ensure that there is no risk whatsoever for me. And the penalty is stiff, something like $7500 per child using the software.

As for mandating age verification, it's unclear to me how you think that it's possible to deliver an API giving age bracket info (in the case of DB48x, the idiomatic way would be an RPL command that returns that info) without having a facility to enter age or date of birth or something like that. So yes, everyone who reads the text interprets it as mandating age verification.

DB48x author here. To be fair, the definitions of "operating system", "application" or "user" are so vague that I decided to

1. Not take any risk 2. Take a stand

The point is more to draw attention

A video explaining the philosophy and technology behind the project. https://www.youtube.com/watch?v=jNOA39HnkcM

Sorry about that ;-)

It’s ok, I may be able to live with it :)

Though sadly I have already had to tell some friends that I’m not involved in the project.

It's a tribute to Hewlett and Packard, but taking the first names, and with the individuals reversed for balance.

I do not believe there is any possible infringement on a clearly new design, even if that design is intentionally reminiscent of the HP logo.

In theory yes. In practice, the TI 83/84 are probably not beefy enough, and the NumWorks has a keyboard that makes the endeavour really complicated.

JupyterLite includes SymPy CAS, Pandas, NumPy, and SciPy in WASM (Pyodide) in a browser tab; but it's not yet easy to save notebooks to git or gdrive out of the JupyterLite build. awesome-jupyter > Hosted notebooks; Cocalc, BinderHub, G Colab, ml-tooling/best-of-jupyter

It's also possible to install JupyterLab etc on Android with termux: `pkg install proot gitea python; pip install jupyterlab pandas` iirc

But that doesn't limit the user to a non-QWERTY A-Z keyboard for the College Board.

jupyter notebooks can be (partially auto-) graded in containers with Otter-Grader or nbgrader; and there's nbgitpuller or jupyterlab-git for revision control or source control in (applied) mathematics