Pinterest is a site for collecting and sharing photos of interesting objects around the web.
In a little over three years, Pinterest has grown from zero page views a day to billions per month. The most recent tally: 3.4 billion monthly page views from its 25 million members worldwide.
Today, Pinterest is valued at $2.5 billion following a $200 million financing round earlier this year.
This slideshow talks about the software and hardware Pinterest used to get where it is today. Warning: It's for geeks only!