But not a particularly high density - 10 Bytes per square inch. I think mike was talking about storing data on photographic film, like many of the microfiche data storage systems already in use, but intended for direct computer reading. Many films will resolve 100 line pairs per millimeter; this directly translates to about 3.2 MBytes per square inch. This isn't particularly new technology, but it'll probably never become widely used in the consumer sector. Most end-consumers simply don't think even a couple of years ahead; witness all the folks who transferred home movies to videotape, which might last for a decade or two at most, and then tossed the original film. The original film would've been good for centuries if processed properly. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927