Salix OS

A good tutorial on the practicalities of unicode (UTF-8) in Python, and when it collides with other encodings. 2009, so may not be fully up to date.

http://lobstertech.com/python_unicode.html

http://joelonsoftware.com/articles/Unicode.html

This is where I found it: https://maurus.net/resources/programming-languages/php/. Also I was well-aware of character sets before, it was interesting to read.