• I have searched open and closed issues and pull requests for duplicates, using these search terms:
  • telephone
  • T9
• I have checked the latest main branch to see if this has already been fixed, in this file:
  • src/ch21-01-single-threaded.md

URL to the section(s) of the book with this problem: https://doc.rust-lang.org/book/ch21-01-single-threaded.html#listing-21-1

Description of the problem:
In the following text:

[..] 7878 is the port. We’ve chosen this port for two reasons: [..], and 7878 is rust typed on a telephone.

I think many people will be confused by that last part. It certainly took me a few seconds to parse it. This mnemonic system isn't used in all countries, and the English book is the de-facto international version of the book, so more explanation is needed.

So just to prevent confusion, perhaps it should explicitly mention or link to the T9 or Phoneword Wikipedia articles. (T9 was my connotation, but it turns out Phoneword is the general term for these kinds of mnemonics.)