Modern WTs feature computer control (the controller) whereby the computer will execute a given control strategy, telling the WT how to behave under different conditions. Examples of components of a control strategy would be the cut-in and cut-out wind speeds, when the WT should cut out in low, falling wind speeds and when it should cut back in at high, falling wind speeds when it has already cut out (see Hysteresis). Depending on the type of WT (fixed/variable speed, pitch/stall-regulated), there will be other more complicated logic in the control strategy.