“Using Data Sets” on page 20 explains: TSO/E command consists of a command name that is generally followed by one or more operands. command name is typically a familiar English word that describes the function of the command; for instance, the RENAME command changes the name of a data set. Operands provide the command with specific information.
Explains simple concepts and leads new users through basic TSO/E tasks, such as logon, use of panels and data sets, and sending and receiving information. It shows them how to use the Information Center Facility, issue line mode TSO/E commands, and access ISPF/PDF.
This is normal for some programs. When you are finished using TSO/E, issue the LOGOFF command to sign off from the system and end your terminal session. The system releases your user ID until the next time you issue the LOGON command. You can also sign off from the system by issuing the LOGON command.
Communicating With Other Users There are many ways to communicate with other users in TSO/E. You can: Send short messages to the master console operator. Send short messages to a specific operator or operator console. Use the LISTBC command to display messages sent to you by the system operator and by other users on your system.