Do you know how to use a slide rule? This is my father’s from long, long ago. 
Discussion
It’s an awesome tool, my father has one too, he showed me once, how to use it.
I’ve never used one, but I think I could figure it out.
You made me curious, so I watched this. 20 minutes well spent. https://youtu.be/rJKmc4PVdh4
Businesses have been built on this!
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I did at one point but have forgotten. However I still have the book. 
never heard of a slide rule, never seen one
I think my dad had one. I forget how to use it though
I once knew how. Long, long ago. Now if I can just remember where I put it lol.
Should be with my TI calculator. Just after Kilby invented the microchip..👏👍😊
No
I must be young
It only goes to 3 units so you have to use scientific notation. Add powers of 10 for multiplication and subtract for division.
I work as a structural engineer, and I have my grandfathers slide rule. I've often been tempted to learn to use it, in lieu of my RPN HP scientific calculator.
I had one that my grandfather used but I threw it away 🤐