On Mon, 09 Dec 2019 15:22:23 -0800, petek wrote:

I studied Engineering to degree level in the late 60's and a slide rule
was an essential and indispensable tool. I still have mine. It's a
Thornton P201. Two sided with 3 "Log Log" scales (LL1, LL2 and LL3)
which I never did find a use for.

I have a Thornton AA010. Also two sided, LL1, LL2, LL3 (and inverse
LL1,LL2,LL3). And lots of other scales I don't remember! I don't know
where the manual went.

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