develop a new Physical File called STUMAS (Student Master) with Record Length 30 in your Library, use the command CRTPF and prompt it by using F4 - develop 5 records in the File using STRDFU Option 5 or running upddta command against the file - develop new MenuA and add 4 options in it.  One of the options should be to take you to MenuB, the other 3 options can by anything of your choice - develop new MenuB and on this Menu have an option for Adding/Changing/Deleting recourds from STUMAS, another option for Runqry against STUMAS and third option to go back to MenuA - In the end shown your library and grant me *ALL authority.  You can make by using the wrkobj yourlibrary command and using option 2 edit to grant my id BHATTI full authority

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Linux

An operating system (OS) is the software which manages hardware and resources, like CPU, storage and memory. The OS bridges the applications and hardware and makes the connections between all of your software and the hardware resources.