Synchrotron and dust emission both play an important role in the
 infrared emission of quasars and AGN. We propose to observe
 a complete sample of quasars (the Bright Quasar Sample) to
 study the interplay of both components, to see how radio loud
 and radio quiet sources differ, to correlate the IR properties
 with those measured in other bands, to measure the dust emission
 spectrum. We also want to observe few particularly unusual sources
 and compare them with the main sample.

 We propose photometric observations of those sources of the
 complete sample we define below that are not observed in the
 core program between 7.3 micron and 200 microns. We also propose
 spectroscopic observations of 4 sources, among the brightest,
 to detect possible emission features associated with dust.

 We have data covering the electromagnetic spectrum from the visible
 to the X-rays for all sources of the sample. The ISO
 observations will therefore be correlated with other properties
 of the sources, like X-ray emission, the importance of the blue
 bump, line properties, radio emission properties, etc.