Practical Data Dictionary is a: - 54 pages handbook - for free - which unifies the most used data expressions and places them within a clear framework Actually it became a little bit more than a dictionary. It gives you a lot of examples and case studies, and explains why, how and what you should do, when you are dealing with data. I think it helps a lot for online businesses to start being data-driven – or take it to a next level. Download it fully free here: http://bit.ly/datadicts You can follow me on Twitter here: https://twitter.com/data36_com