Astrophysics Group, Blackett Laboratory Imperial College, London
Preliminary results will be reported from the ELAIS ISO survey at 6.7, 15,
90 and 175 
,
covering a total of 13 
of
clean, high-latitude
sky at 15 and 90 ,
and smaller areas at the other wavelengths.
Complementary surveys have also been carried out at optical, near
infrared and radio wavelengths. Source counts at 15 and 90 ,
and their interpretation, will be discussed. Preliminary results on
identifications and spectroscopy of the survey sources will be given.
Results from surveys of the Hubble Deep Fields, North and South, at 6.7
and 15
will also be reported. A discussion of the
implications for the star formation history of the universe will be given.