I discovered catalogs.google.com. It looks like Google have scanned in, OCR-ed, then indexed whole stacks of printed product catalogs. For example, a search for CPU cooler produces little JPEG extracts from printed catalogs, with the search terms highlighted in the JPEG
I don't think I will ever ceased to be amazed, pleased, and tickled-pink about the good things Google do. Google are even running a programming competition at TopCoder. They are even looking for more staff.