What are the three ways a user can invoke the z/OS UNIX shell?

What are the three ways a user can invoke the z/OS UNIX shell?



(1) From a 3270 display or a workstation running a 3270 emulator

(2) From a TCP/IP-attached terminal, using the rlogin and telnet commands

(3) From a TSO session, using the OMVS command


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