xvii in through we apply machine learning on increasingly large data sets keeps it small the data still fits easily into an average computer' memory increases the challenge by looking at "large data this data fits on your machinebut fitting it into ram is hardmaking it challenge to process without computing cluster finally looks at big data for this we can' get around working with multiple computers through touch on several interesting subjects in data science in moreor-less independent matter looks at nosql and how it differs from the relational databases applies data science to streaming data here the main problem is not sizebut rather the speed at which data is generated and old data becomes obsolete is all about text mining not all data starts off as numbers text mining and text analytics become important when the data is in textual formats such as emailsblogswebsitesand so on focuses on the last part of the data science process--data visualization and prototype application building--by introducing few useful html tools appendixes - cover the installation and setup of the elasticsearchneo jand mysql databases described in the and of anacondaa python code package that' especially useful for data science whom this book is for this book is an introduction to the field of data science seasoned data scientists will see that we only scratch the surface of some topics for our other readersthere are some prerequisites for you to fully enjoy the book minimal understanding of sqlpythonhtml and statistics or machine learning is recommended before you dive into the practical examples code conventions and downloads we opted to use the python script for the practical examples in this book over the past decadepython has developed into much respected and widely used data science language the code itself is presented in fixed-width font like this to separate it from ordinary text code annotations accompany many of the listingshighlighting important concepts the book contains many code examplesmost of which are available in the online code basewhich can be found at the book' websitebooks/introducing-data-science