  IIA0: and IIDRIVER? 
 The Question is:
 
What does the device IIA0: refer to?
 
 
 The Answer is:
 
  SYS$IIDRIVER (IIcu:) is the OpenVMS-provided device driver for the
  Inter-Integrated Circuit bus, also known as the IIC or I2C bus.
  This driver is used for various purposes, including reading in the
  system environmental and hardware status data on various platforms.
 
