Looks like the one I got years, no, decades ago, when they were already mostly obsolete. Welcome to wonderful world of analog calculation!
Can I recommend a book? I think you might enjoy this:
https://www.docentpress.com/books/the-history-and-development-of-nomography/
jz.tusk /
npub153…u8ttx
2024-07-23 04:43:23
in reply to nevent1q…3cx4
Author Public Key
npub153xkjlg4d9z4ft3kdzy3rhvky8xvawpk4h9vzgldq7phpxz2rvfqyu8ttxPublished at
2024-07-23 04:43:23Event JSON
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