In the U.S styles Manual, what are the things you use all Capital letters on?

In the U.S. edition of the *Chicago Manual of Style*, all capital letters are typically used in the following cases:

**Acronyms and Initialisms**: When using acronyms (e.g., NASA, FBI) or initialisms, they are written in all capital letters.

**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.

**Proper Nouns**: All capital letters are used for proper nouns, such as names of people (e.g., George Washington) and places (e.g., New York City).

**Emphasis**: In some contexts, all capital letters may be used for emphasis, though this is generally discouraged in formal writing.

**Signage or Labels**: All capital letters may be used on signs or labels for clarity and visibility (e.g., "EXIT," "DANGER").

**Certain Formal Documents**: In legal and formal documents, important terms or sections may be in all capital letters for emphasis.

**Products or Brands**: Some brands or products may be stylized in all caps (e.g., eBay, iPhone).

While these are some of the common uses, it's important to refer to specific guidelines for different contexts, as rules can vary depending on the publication and its style preferences.