Hacker News on 28 September 2014

• Mining Bitcoin with pencil and paper: 0.67 hashes per day
• Material Design for Bootstrap
• LibreSSL: More Than 30 Days Later
• Writing a simple operating system from scratch (2010) [pdf]
• Peter Thiel's Zero to One Might Be the Best Business Book I've Read
• Dear clueless assholes: stop bashing bash and GNU
• Hong Kong protest: Why are pro-democracy supporters staging a sit-in?
• Building OS X Apps with JavaScript
• Machine learning is teaching us the secret to teaching
• The downfall of Quora (2013)