  We analyzed RXTE/PCA and HEXTE data of the transient black hole binary GX
339-4, col- lected over a time span of eight years. We studied the properties
and the behavior of low frequency quasi periodic oscillations (QPOs) as a
function of the integrated broad-band variability and the spectral parameters
during four outbursts (2002, 2004, 2007, 2010). Most of the QPOs could be
classified following the ABC classification that has been proposed before. Our
results show that the ABC classification can be extended to include spectral
dependencies and that the three QPO types have indeed intrinsically different
properties. In terms of the relation between QPO frequency and power-law flux,
type-A and -C QPOs may follow the same relation, whereas the type-B QPOs trace
out a very different relation. Type-B QPO frequencies clearly correlate with
the powerlaw-flux and are connected to local increases of the count rate. The
frequency of all QPOs observed in the rising phase of the 2002, 2007 and 2010
outburst correlate with the disk flux. Our results can be interpreted within
the framework of recently proposed QPO models involving Lense-Thirring
precession. We suggest that type- C and -A QPOs might be connected and could be
interpreted as being the result of the same phenomenon observed at different
stages of the outburst evolution, while a different physical process produces
type-B QPOs.
