\"Susan\" could refer to several different things depending on the context. Here are a few possible meanings:
1. A person's name: In this case, \"Susan\" is a person's name.
2. A computer system: In this case, \"Susan\" could refer to a specific computer system or a general term for a computer system with the name \"Susan\" as a username or password.
3. A book byline: In this case, \"Susan\" is a book's byline (a name given to the person writing the book) and could be used to refer to the author in conversation.
Without more context, it's difficult to determine which of these meanings are the case.