Simplish attempts to have good basic element style coverage, including your varieties of HTML lists:

Ordered lists

1. contain lists
2. of numbered things
3. Can contain sub-lists
   • of other stuff,
   • even in a sub-unordered list
4. Sublist, ordered
   1. First sub-thing
   2. Second sub-thing
5. The End

Unordered lists

• don’t
• have
• numbers
• Sublists might be ordered
  1. which might themselves be lists, in order
  2. whether or not it’s groceries
• Or not
  • Positive
  • Negative
• The End, Part the Second

Definition Lists

Definition List

An [X]HTML element that’s handy for word and acronym expansions, descriptions, and, yes, definitions.

UNIX

Isn’t an acronym.

GNU

Is. It stands for GNU’s Not UNIX.