under z/vm:  if the psw is not shown in any message, display it by entering: #cp d psw  cp d psw psw = 030e0000 810591b0
initialism for program status word: a computer's hardware register that maintains the status of the program being executed
"under z/vm:  if the psw is not shown in any message, display it by entering: #cp d psw  cp d psw psw = 030e0000 810591b0" What is the definition of "psw"?