Gradrecs: What do the search areas mean?

What do the search areas mean

Current - Unit:

Queries your majors and minors for the current term and within your curriculum codes.

All - Unit:

Queries your majors and minors within your curriculum codes. Searches all terms rather than the current term.

Current - My Units:

Queries undergrads majors and minors for the current term but searches all curriculum codes for departments where you're a manager.

Current - Campus:

Queries all UIUC undergrads for the current term.

All - Campus:

Queries all undergrads for all terms.