  Using data from IRAM's Plateau de Bure Interferometer and 30 m Telescope, we
discuss the mm-wave absorption lines of CS, SO, H2S and HCS+ which arise in
diffuse clouds occulting several extragalactic continuum sources. Typical
relative abundances are X(CS)/X(HCO+) ~ 2, X(CS)/X(SO) ~ 2, X(CS)/X(H2S) ~ 6
and X(CS)/X(HCS+) ~ 13.
