This Natural profile parameter identifies the Natural subsystem to be used.

Possible settings	1 - 4 characters	Natural subsystem. Note: If you specify less than 4 characters, blanks will be appended so as to get a 4-byte setting.
Default setting	NAT8
Dynamic specification	yes
Specification within session	no

Notes:

1. For the purposes of the Natural CICS Interface (see ROLLSRV, SIPSERV, SUBSID), the Natural profile parameter SUBSID is ignored if it is specified in a parameter string by a profile parameter SYS or PROFILE or in an alternate Natural parameter module (as specified with the profile parameter PARM).
2. For information on the Natural subsystem, see Natural Subsystem under z/OS in the Operations documentation.