A practical implementation of a slide rule can be found on watches such as the B... | Hacker News

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spreiti on Oct 23, 2018 | parent | context | favorite | on: The Slide Rule

A practical implementation of a slide rule can be found on watches such as the Breitling Navitimer. I like to use it for quick currency conversions when traveling.

z2 on Oct 23, 2018 [–]

And most are helpfully marked for unit conversions as well! I have mine set for restaurant tipping by default (North America).

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