Hacker News on 15 December 2013

• Tydlig – Calculator Reimagined for iPad and iPhone
• The NSA: An Inside View
• DNA seen through the eyes of a coder
• 404 - File not found
• Wil Shipley: My “Doom” 20th Anniversary Stories
• Don't Distract New Programmers with OOP
• CSS Variables in Firefox Nightly
• Debian 7.3 is out
• TCP HTTP Server written in Assembly
• Voevodsky’s Mathematical Revolution