pinkupriyanka wrote:Hi everyone,
I'm new to this forum, how do i start with mainframes as i don't know much about it? I also need some material in which i can understand things properly.
As NicC says, you should retrieve and look through the document from several years ago.
This site, a sister to our site, has links that you might find useful. Mainframes, which pretty much predate the *nix (Unix, Linux, and other systems with a similar look and feel) and Windows type systems have a very much different look and feel. Much of this is because of the limited hardware capabilities in the late 1960s and 1970s dictated this environment. It has been retained not so much that it is "better" than the *nix or Windows environment but because its users can be very productive in the environment.
OS/360 from the 1960s is the ancestor of MVS and z/OS. Truly, it was the first disk based batch oriented operating systems. DOS/360, the ancestor of z/VSE, was not truly a disk operating system. Rather is was a development of TOS/360, a tape resident operating system, very much in the model of running IBSYS/IBJOB, another tape system for earlier systems, on disk.