“What makes data Big?” “Big” can refer to the large amount of data from Terabytes to Petabytes, to Exabyte to Zettabyte to Yottabyte and beyond. Or refer to the data's source: social, mobile, machine-tomachine, telemetry or location. Or it can address the speed of data—lightning fast and getting faster all the time. It can also refer to complexity. What is the signal in millions of potential combinations?