It was very slow and broke easily, but this is how early tech looks like 25 years before their prime time.
https://video.nostr.build/909d8888a44ee3f39029c2b71a77866179dc097f1e67f2e8e20d2461543228c1.mp...
In high school, one of my friends had a Casio calculator watch. NGL, I was a little jealous. IIRC, it could even store, like, 4 KB of data.
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