R has a rich collection of functions for doing time series analysis. For the beginner, however, the functions can be difficult to use. I have written a collection of R functions to better integrate the R analytical and graphical tools and provide a simpler interface for doing Box-Jenkins type ARMA/ARIMA modeling and analysis. There are also some routines for intervention analysis and transfer function modeling. In addition I have written some functions that use simulation to help students and more experienced analysts get a better understanding of the behavior of ARMA models. These functions are collected in the R package RTSERIES.