ELI5: "Wouldn't it be extremely inefficient to copy every single coffee purchase on everyone's computer?"

"Maybe you could tell me what is going on. And please, speak as you might to a young child. Or a golden retriever. It wasn't brains that brought me here; I assure you that." -- Margin Call

Submitted January 27, 2016 at 03:57AM by davout-bc http://bit.ly/1nm2Uij