Off Topic — HabitableZone

Off Topic » in reply to A dictionary of common tools

confusion reigns....

I identify with all the tools mentioned as they are defined save one; what is that thing with the wheel in front that your dictionary identifies as a "Phone?" And, how does one operate it? Does it have a log/log decalog function? Is it in the same tool family as the Curta calculator?

Please advise, Publius

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