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+1 for the GraphGear 1000. Had one for about 8 years before I dropped it and broke the tip. Definitely my favorite pencil. Ordered a replacement off Amazon and hit the jackpot as they sent me a whole box of them rather than just a single one lol. I've now got more than enough GG1000s for my lifetime.
I still remember a scene from Seinfeld where George is at the unemployment office and when the lady asks him for the business's phone number, he says KL5 8383.
This reminds me a lot of what Lexus used to do in their cars. Their Remote Touch interface was literally a mouse with a pointer and the mouse would latch onto buttons as you moved the pointer around the screen. Very odd infotainment interface haha
I could be wrong but the only app that can send and receive messages through RCS on Android is Googles own messages app. Since Google runs their own RCS instance, they're the only ones interfacing with it. There's currently no API to allow for third party apps to make use of RCS.
That being said, RCS is designed to be an open standard. It's just that only Google is really pushing for it right now and running an instance of it. If I'm not mistaken, AT&T ran their own instance for a while but it was shut down in favor of Googles instance.
Scratch was what got me into programming around 10 years ago! I was in middle school at the time and now I've just started working full time as a junior engineer. Without Scratch, I probably would've pursued something different. Thanks for your work!
Interesting Q&A, thanks for sharing!