What are the demo 1 and demo 2 terminals on the oscilloscopes?
Some of the Agilent scopes come with "Demo 1" and "Demo 2/Probe Comp" terminals (little wire loops actually) on the front panel. With the optional Educator's Kit, you can provide demo or training signals on these terminals.

The Demo 2 terminal also "outputs the Probe Comp signal which helps you match a [passive] probe's input capacitance to the oscilloscope channel to which it is connected."

Check the User's and/or Programmer's guide for the scope you're working with. The above information happens to come from the User Guide for the 2000 X-Series and the Programmer's Guide for the 3000 X-Series.