Hacker News on 22 May 2014

• PDFium: Chrome’s PDF rendering engine is now open-source
• Is It Better to Rent or Buy?
• Some of the work we did at Danger
• My No-Soap, No-Shampoo, Bacteria-Rich Hygiene Experiment
• Osmo
• What does GCHQ know about our devices that we don't?
• Send money to debit cards
• An open letter on feminism in tech
• A Tour of Machine Learning Algorithms
• 9m.no – Short URLs for the Unicode Age