Select (version 1)
The coordinate reference system is latitude/longitude and theWGS84 datum.
A "shapefile" consist of at least three actual files. This is a commonly used format that can be directly used in Arc-anything, DIVA-GIS, and many other programs. Unfortunately, non-latin characters are garbled.
A "RData" file can be used in R (with the sp package loaded)
Some files have been compressed and grouped in ZIP files. You can use programs such as 7-zip to decompress the files.