This document discusses how to import different types of data files into R, including CSV, Excel, SAS, STATA, and SPSS files. CSV files can be imported using the read.csv() function. Excel files require the readxl package and are imported using read_excel(). SAS, STATA, and SPSS files can be imported using the haven package functions read_sas(), read_dta(), and read_sav() respectively. Examples are provided for importing each file type.