The software required for this book is the Haskell platform, the cabal tool to install libraries (which comes with Haskell), as well as tools such as SQLite3, gnuplot, and the LAPACK library for linear algebra. The installation instructions for each piece of software are mentioned at the time when the software is needed.

We tried to be cross-platform in this book because Haskell is a cross-platform language. SQLite3 and gnuplot are available for the Windows, Mac, and Linux operating systems. One problem that we encountered while writing this book was the difficulty in installing LAPACK for Windows, which is used in Chapter 8, Building a Recommendation Engine. At the time of writing this book, it is possible to get LAPACK to run on Windows, but the instructions are not that clear and hence it is not recommended. Instead, we recommend Windows users install Debian or Ubuntu Linux using VM software (such as Oracle VirtualBox).