  Two iterative techniques are described for decomposing a long-slit spectrum
into the individual spectra of the point sources along the slit and the
spectrum of the underlying background. One technique imposes the strong
constraint that the spectrum of the background is spatially-invariant; the
other relaxes this constraint. Both techniques are applicable even when there
are numerous overlapping point sources superposed on a structurally-complex
background. The techniques are tested on simulated as well as real long-slit
data from the ground and from space.
