Here's the typical order:
1. Roman Numerals (I, II, III, etc.) for the main points
2. Capital Letters (A, B, C, etc.) for sub-points within a main point
3. Arabic Numerals (1, 2, 3, etc.) for sub-points within a sub-point
4. Lowercase Letters (a, b, c, etc.) for sub-points within a sub-point within a sub-point
5. Arabic Numerals (1, 2, 3, etc.) for even further sub-points
Example:
I. Main Point
A. Sub-point 1
1. Sub-point 1.1
a. Sub-point 1.1.1
1. Sub-point 1.1.1.1
B. Sub-point 2
II. Main Point 2
A. Sub-point 1
This structure helps organize information clearly and logically, making it easier to understand and follow.