The 'F' is silent, as I put it when explaining what RTFM meant to an elderly relative.

Haha that's actually really clever!

FYI it's generally accepted that F stands for Fine if you don’t want to swear :)

Same with TFA. The Fine Article.

Yeah, though in this case, it fit in well with the fact that my relative had recently heard the "There's no 'F' in broccoli" dad-joke:

  Customer: "I'd like a pound of broccoli, please."
  Grocer: "I'm out of broccoli."
  ... repeat 1 or two times
  Grocer: "How do you spell broccoli?"
  Customer: "B-R-O-C-C-O-L-I."
  Grocer: "You left out the 'F'."
  Customer: "There's no 'F' in broccoli!"
  Grocer: "That's what I'm trying to tell you!"

My apologies for any annoyance this joke has caused.

if you liked that, here's a good delivery of a variant of that joke by Harrison Ford: https://youtu.be/TRHWvVBxWCw?t=47

big friendly telescope?