Whenever I go to a restaurants and am asked if I have any food alleges I reply "I am too old for that".
... I used to know how to use a book of log tables - there were other tables in there too but memories fade.
But a slide rule was beyond me...
I completely forgot about that 
- But now I remember there was something like that in my student time 
.
I was taught the basics of using a slide rule in high school (11th grade, IIRC.)
(also, we were taught how it worked!)
It was just before pocket calculators became practical for "normal people."
Arithmetic Tables: It always used to interest me that the younger works colleagues, when faced with even a trivial arithmetic calculation, say splitting a restaurant bill between 3 or 4 people or similar, would need to grab a calculator. However, I guess they would outclass me when it came to making and uploading a TikTok video.
Likewise, our maths teacher had the first calculator in my highschool.
It was a CANON, did four functions and had the sexy red LED display.
It was probably this;
We used the Faber-Castell slide rule, a very basic model, but even that could do an astonishing amount of functions.
As well as the Four Figure Maths tables.
Usually got a new copy each year for the last three years of high school, we used them so much.
Sitting in high school assembly hall watching Apollo 11, on the moon.
A massive 26inch BW TV screen.
Ahh those were the days.....
What calculator did they have, a Canon Palmtronic LE-80?
Sounds like someone in charge of a device that is many many times higher than his/her IQ.
Tom.. 
PS. I hope you have all seen the movie "Hidden Figures" very interesting Hollywood version of a real life event and those involved.
After listening to the landing I went to the pub, had a few pints with friends and back home for a sleep, but set my alarm clock for 3 AM for the actual Moon walk live. Then the following day set off with my friends for a weeks camping holiday in North Wales.
I used to play games on my PC calling BLOAD"CAS:",R and waiting a couple of minutes to dowload it from a cassette tape...
I am so old that I remember the white spot in the centre of the screen when you switched the television off.
There was a choice of two channels then.
.. and adjust the 'vertical hold' to stop the picture rolling up or down.
and the tracking on the VCR too, or is that too modern....
I remember our family doctor making a house call.
We had a candle stick telephone without a dial for the party-line service!
I remember getting on a bus with my mother and the fare was 1d for her and 1/2d for me.
I remember when restaurants looked like restaurants.
I remember when kitchens looked like kitchens.
I remember when candy looked like candy.
I remember when candy looked like cigarettes!
Anybody remembers these good old logarithm tables and sin/cosine tables?