A little more about CDROMs

[Thomas Shaddack]

http://www.wired.com/news/medtech/0,1286,60138,00.html

Summary: Coating a CD by a reagent, then exposing it to a sample that
changes its color, then counting read errors on the CD.

Maybe could be a nice application for the lowest-level laser signal access
I proposed earlier. (It apparently really could have some unexpected
applications beyond CD copying, Tim.)