coding-category-list

coding-category-list is a variable defined in `C source code'.
Its value is

(coding-category-utf-8 coding-category-iso-7 coding-category-charset coding-category-iso-7-else coding-category-iso-8-else coding-category-emacs-mule coding-category-raw-text coding-category-iso-7-tight coding-category-iso-8-1 coding-category-iso-8-2 coding-category-utf-8-auto coding-category-utf-8-sig coding-category-utf-16-auto coding-category-utf-16-be coding-category-utf-16-le coding-category-utf-16-be-nosig coding-category-utf-16-le-nosig coding-category-sjis coding-category-big5 coding-category-ccl coding-category-undecided)

Documentation:
List of coding-categories (symbols) ordered by priority.

On detecting a coding system, Emacs tries code detection algorithms
associated with each coding-category one by one in this order. When
one algorithm agrees with a byte sequence of source text, the coding
system bound to the corresponding coding-category is selected.

Don't modify this variable directly, but use `set-coding-system-priority'.