You can think of UNIX files like data sets, except that the segments are delimited by '/' (forward slashes) in UNIX, while data sets are delimited by '.' (periods).

Example

Note that while the names are similar, these two files do not point to the same location because one is in the UNIX file system while the other one is in the MVS file system.

Another important distinction between UNIX and MVS is that most commands and file names are case-sensitive in UNIX, meaning that a file called myfile is different from a file called MYFILE.