Upon initial invocation of IKJEFLN1, this parameter contains either the value from the previous TSO/E session or the value the user specified on the LOGON command. Upon subsequent entry to IKJEFLN1, this parameter contains the operator ID card select character entered on the logon panel. You can use this parameter to supply a different operator ID card select character to the logon panel. The maximum length of this field is one byte. The only allowable values are the character 'S' and ' '. If the field is ' ', the user is not prompted to enter the data using the Operator ID Card Facility. If the field is 'S', the user is prompted to enter the data using the Operator ID Card Facility.