With so many players latching on to the idea of big data these days, it is inconceivable that everyone has the same definition in mind. I’ve heard folks describe big data as just being the combination of existing data sets while others don’t consider data to be big until there are hundreds of thousands of observations. I’ve even seen the idea that big data just means the increasing availability of open data. There is a similar challenge with data analytics. On one end of the spectrum, data analytics is just data analysis, but with a cooler name. On the other, data analytics involves big data (really big data) and machine learning. I needed to get a grasp on the various terms and concepts for my work, so I thought I’d share some of what I learned with you. Prepare to learn.