The term 'kind of clock' can refer to several different types of clocks. An ALARM clock is a type of clock that is designed to wake a person up at a certain TIME. ATOMIC clocks are highly accurate clocks that use the frequency of an ATOMIC transition to measure TIME. CUCKOO clocks are clocks that feature a CUCKOO bird that pops out of a door at regular intervals. Finally, TIME clocks are clocks that are used to record when an employee starts and ends their shift.