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4.2.3.1.1 Types of Streams

 






   The three types of Session Manager streams are input, output, and extra. 





   Input Stream:  An input stream contains information that you want 
   interpreted as commands or input to programs. 





   Output Stream:  An output stream contains the output from commands and any 
   messages from other TSO/E users, the operator, or from background jobs. 
   You can also copy information from an input stream into an output stream, 
   thereby creating a complete record of all commands entered and all of the 
   output from those commands. 





   Extra Stream:  You can copy information, such as the output from certain 
   commands, into an extra stream. In the default environment, an extra 
   stream is used to contain the lines, windows, and arrows that visually 
   divide the display screen. You cannot specify an extra stream on any of 
   the Session Manager commands when an input or output stream is required. 





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