  The European Large Area ISO Survey (ELAIS) has surveyed ~12 square degrees of
the sky at 15mu and 90mu and subsets of this area at 6.75mu and 175mu using the
Infrared Space Observatory (ISO). This project was the largest single open time
programme executed by ISO, taking 375 hours of data. A preliminary catalogue of
more than 1000 galaxies has been produced. In this talk we describe the goals
of the project and present a provisional number count analysis at 15 \micron.
