IPAC is the designated NASA center for archiving data from infrared space
missions and supporting astronomical research using these archives.
In the past, IPAC has developed its tools and maintained its data
archives to be maximally useful to visiting scientists working with
IRAS data.
IPAC has made the transition to an on-line archive
in order to better support not only the continuing demand for access to
IRAS catalogs and images,
but also new infrared missions.
We describe in the chapter the on-line services for data access at IPAC: