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This talk will be about some results on nonlocal wave type equations. The equations that will be considered are of the form $u_{tt}-L_{u_{xx}}=Bg{(u)}_{xx}$ where nonlocal effects are due to having $L$, $B$ pseudodifferential operators. This class generalizes all Boussinesq type equations. Generally speaking solutions of the above equation behave quite well due to the dispesive effect of $L$ and the smoothing effect of $B$. The same phenomenon is observed in one directional waves, comparing Burger's equation to the KdV and BBM equations.