Really good Meetup with the F# community last Tuesday.
The image is of type providers, a wonderfully powerful F# feature.
Here’s some links:
Finally here’s a good introduction on the monad.
http://programming-journal.org/2018/2/12/
Many thanks to MYOB for hosting, and Sam for the enthusiastic tutorial. I really did learn a lot, and look forward to learning more F# over the months and years ahead.