In general, when we work in an R session for doing statistical analysis, we first read the data, then use one or more packages, libraries, or sets of functions to work on the dataset. We can also write our own functions to accomplish specific tasks. We create outputs and create graphs and graphics. Save our work to a file or several files and terminate the R session. For terminate an R session, type "quit()" (note, even quit is a function), and the program asks you if it can save the R session. If you order "yes", the session is saved as an .Rdata file and is available at a subsequent session.