I read about Gray code via a site that I tweeted about recently.
This is the site: thegeekstuff.com
The About page for that site has a quote:
"There are only 10 types of people in the world — those who understand binary, those who don’t, and those who understand Gray code".
But the interesting thing about Gray codes is the different kinds of uses that they have.
- Vasudev Ram - Dancing Bison Enterprises