What heating and cooling system types are compatible with the TH8320U1008 thermostat?

The TH8320U supports up to 3 Heat/2 Cool systems. Compatible system types include gas, oil, or electric heat with air conditioning, heat pumps, warm air, hot water, high-efficiency furnaces, steam, gravity, heat only, cool only, and 750 mV heating systems. It also supports two-wire systems, power to open and close zone valves (Series 20), and normally open zone valves. (Page 1)