built into most environments where SAS is launched are the product specific sample programs and data. They are hiding below the surface, just waiting for the adventurer (including you)!
Just try running the code:

proc contents data= sampsio._all_ nods details; run ;

Although the library SAMPSIO does not reveal itself before you use it, it is probably sitting there quietly waiting to be investigated.

This will save you any fuss with SASROOT
(until you really need it)

;-)