What if you have a lot of old data files in SPSS form and you do not have SPSS software. You are in luck if you have Rstudio. Current versions of Rstudio load SPSS data files without needing a special library for the task. There are libraries for this task.
To load SPSS data:
Open RStudio, on menu bar choose File, scroll to Import Data set, choose from SPSS.
A window opens to load the data.
Enter file name or url into file/url box.
Preview data in preview window. If it looks okay push the import button. And the data is loaded into Rstudio ready for use.
This is a very useful feature of RStudio.