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A product region processes NetMaster REXX on behalf of a user.
A user can be a person who logs on to the region with a user ID and password. Also, there are internal environments that act like real users, except that they do not have any real terminal associated with them. These internal environments all have virtual user IDs. The most common virtual user IDs are those IDs associated with the background environments.
While there is one NetMaster REXX processing region for each user, within each user region there can be one or more NetMaster REXX processing environments.
A processing environment provides the internal services and facilities that are required to execute NetMaster REXX processes for the user from its associated window.
Real users, using real terminals, can have one or two windows, and therefore can have one or two active processing environments directly associated with these windows. Internal users have only one window (logically operating in line mode) and therefore have only one processing environment.
A NetMaster REXX process always operates within the processing environment associated with the window from which the process was invoked.
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