In the U.S. edition of the *Chicago Manual of Style*, all capital letters are typically used in the following cases:
1. **Acronyms and Initialisms**: When using acronyms (e.g., NASA, FBI) or initialisms, they are written in all capital letters.
2. **Headlines and Titles**: In headline-style capitalization of titles, major words are capitalized, and sometimes minor words are also capitalized based on specific style guides.
3. **Proper Nouns**: