3R is an open source, free statistics software. 'Using R for Principles of Econometrics' provides R code solutions for most of the examples in the undergraduate Econometrics textbook 'Principles of Econometrics' by Hill, Griffiths, and Lim, fifth edition. However, 'Using R' is a self-contained work; it includes brief theory summaries for each chapter and all necessary information for understanding the solved examples. In addition, 'Using R' comes with a freely downloadable R data package that facilitates the use of the 'Principles of Econometrics' textbook data. No previous knowledge of R or Econometrics is necessary for understanding the content of 'Using R, ' but some knowledge in elementary statistics would help