Hacker News on 20 June 2015

• Suddenly, a leopard print sofa appears
• Blood donors in Sweden get a text message when their blood saves someone's life
• How for-profit prisons have become the biggest lobby no one is talking about
• You Draw It: Family Income vs. College Attendence
• X86 mov is turing complete: mov-only compiler
• Stealing keys from PCs using a radio: cheap electromagnetic attacks
• Windows 10 “WiFi Sense” automatically leaks your wifi password to strangers
• No Time to Be Nice at Work
• Answer to a 150-Year-Old Math Conundrum Brings More Mystery
• GNU social and GNU FM