# Package com.qualcomm.robotcore.util

- Class Summary
  Class | Description
  --- | ---
  ElapsedTime | The `ElapsedTime` class provides a simple handy timer to measure elapsed time intervals.
  Range | Utility class for performing range operations
  SerialNumber | Instances of `SerialNumber` represent serial number indentifiers of hardware devices.
  TypeConversion | Utility class for performing type conversions

- Enum Summary
  Enum | Description
  --- | ---
  ElapsedTime.Resolution | An indicator of the resolution of a timer.