From CNET :
More than 10 years ago, Michael Davidson went looking to capture the beauty of microchip circuitry in photographs. In among the transistors and wire traces, he found something unexpected: Waldo.
What he found was that in many chips, you can find cartoon characters or hidden texts with a microscope.
I found it quite interesting to browse through these pictures. It’s like the famous painters who leave a cursory signature at some corner of their master pieces, only in this case, they did it with special circuit design. I’ll hide some text in my next paper then. Look at the first characters of some paragraph, you might find some interesting.
Next time when I write a paper