NOVA's Tim De Chant posted this awesome photo of the Kilby Solid Circuit, the first working example of a miniaturized electric circuit that combined all the necessary structures onto a single chip. Back in 2000, when he won the Nobel Prize for this achievement, inventor Jack Kilby gave a really nice talk about the history of electronics and the context that lead to his creation. It's definitely worth a read.
Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.