Few handy Tcodes

/nxxxx           To call a TA in the same session (window)

/*xxxx           To call a TA in the same session (window), initial screen is skipped

/oxxxx           To call a TA in the an additional session

/n                    To end the current transaction

/i                     To delete the current session

/o                    To generate a session list

/ns000           To end the current transaction and return to the starting menu

/nend             To log off from the system

/nex               To log off from the system without a confirmation prompt

Where xxxx = TA or Tcode