Customization of the TSO/E environment generally refers to customization that makes a TSO/E facility available or customization that changes default values that affect TSO/E. Customizing the TSO/E environment includes customizing:

• VTAM® and TCAM
• Logon limits
• The logon/logoff process
• ISPF/PDF
• Authorized commands and programs and commands not supported in the background
• TRANSMIT and RECEIVE availability
• HELP data set usage
• Host services availability
• Language enablement support
• Command/program invocation platform support