Hacker News on 12 January 2018

• An Experimental Course on Operating Systems
• Tea if by sea, cha if by land: Why the world only has two words for tea
• Advice for First Time Founders
• Harvard Study Shows Why Big Telecom Is Terrified of Community-Run Broadband
• New DHS policy on demands for passwords to travelers’ electronic devices
• Half of the US government's financial assets are student loans
• One model to learn them all
• Mothers who regret having children are speaking out
• Facebook Overhauls News Feed to Focus on What Friends and Family Share
• Dogecoin's inventor looks to the past for insight into the future