To increase density in a straightforward CAV system, modern hard disk systems use a technique known as __________, in which the surface is divided into a number of concentric zones.

The result of =PROPER("KANSAS") is ________

Fill in the blank(s) with the appropriate word(s).

Security _______________ are devices that store some unique information that the user carries on his or her person.

Fill in the blank(s) with the appropriate word(s).