Cwabs, Inc. Asset-Backed Certificate.....what does this mean?

I am researching an REO and the only lender info I can find is the Cwabs, Inc. Asset-Backed Certificate. I am an new investor and have no idea what this means. Can anyone help me out with this?

CountryWide Asset Backed Securities, Inc. Try http://www.countrywide.com/purchase/f_reo.asp