How about this for completely irrelevant!

How times change!
I was commenting about how, in the 1940s, in the year I was introduced to Algebra, I was bottom of the class in first term, top in last term!
(For my sins, after leaving school at 14, I self studied Calculus.)

In MY real life I never actually made much use of those ideas and, now, I am about as dumb as I was in that first term!
All forgotten!

However, with the Calculus study I also self taught myself to use a Slide Rule.
I still have it—STILL USE IT!

The fun story-----Oh! Those were the days---

In the early 1950s I worked in a big metals merchandising organisation and regularly used my Slide Rule to help customers with quick calculations over the phone.
(The alternative was to get one of the Comptometrists* from the typing pool to bring her machine and sit alongside you.)

Everyone in the office was convinced I had a University education because I could use the Slide Rule!

Think about what grade 1—even preschoolers--- do with those –(1/20th? of the price of my slide rule)—calculators of today!

Brian
*--the spell checker does not even know the word!!!!!!!!
 

bwtr