SAS provides more than 200 data sets in the Sashelp library. These data sets are available for you to use for examples and for testing code. For example, the following step
               uses the Sashelp.Class data set: 
            
proc reg data=sashelp.Class; model weight = height; run; quit;
You do not need to provide a DATA step to use Sashelp data sets. 
            
The following steps list all the data sets that are available in Sashelp: 
            
ods select none; proc contents data=sashelp._all_; ods output members=m; run; ods select all; proc print; where memtype = 'DATA'; run;
The results of these steps (more than 200 data set names) are not displayed.
The following steps provide detailed information about the Sashelp data sets: 
            
proc contents data=sashelp._all_; run;
The results of this step (hundreds of pages of PROC CONTENTS output) are not displayed.
Nineteen Sashelp data sets are used in SAS/STAT documentation, and the following sections describe these data sets: 
            
Sashelp.BaseballSashelp.BEISashelp.BMIMenSashelp.BMTSashelp.BurrowsSashelp.BWeightSashelp.ClassSashelp.CometSashelp.ENSOSashelp.FishSashelp.GasSashelp.IrisSashelp.JunkMailSashelp.LeuTestSashelp.LeuTrainSashelp.MargarinSashelp.MileagesSashelp.ThickSashelp.Vote1980