ClockCreate -> Create a new clock and start it.

Init -> system.

Microseconds -> Construct a time value from a number of microseconds.

Milliseconds -> Construct a time value from a number of milliseconds.

Seconds -> Construct a time value from a number of seconds.

TimeZero -> Predefined "zero" time value.

Clock -> Utility class that measures the elapsed time.

Time -> Represents a time value.