The dos operations are still behind the scenes, they were just made friendlier say for getting the contents of a directory in dos, you used the “dir” command, in windows, and you did the same operation by simply clicking on a folder. Windows has the DIR command stored in code which is executed when a series of operations is done resulting in the folder opening. Ruby, though command line driven is a very powerful language for it takes the strengths of C improving it a lot with its own built in functions. Ruby treats everything as objects and yes even comments though they are not executed due to an exclusion flag of sorts.