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Terminal Emulation
Terminal Emulation
Terminal emulation is often done to give a computer user the freedom to login and gain direct access to applications on a mainframe system. To function, it requires the installation of a specific program on the computer or on a LAN (local area network) server that the machine is connected to. Terminal emulation programs are typically installed on all the workstations of a mainframe computer.
A terminal emulation application functions like any other workstation program - as a separate application that offers its own window to a user. Instead of using a GUI (graphical user interface), a terminal window may present another mainframe system or a text-based user interface.
Different terminals require different terminal emulation programs, the case with many IBM operating systems. This is because the application performing the emulation must comprehend the data streaming from the mainframe system at several different levels, including the session control and data link control.