A great many companies today are currently running numerous legacy (character-based or "green screen") applications on a variety of platforms (Mainframe, AS/400, Tandem, Stratus, etc.). Furthermore, there is an increasing trend toward integrating these systems with front-end GUI, Internet, and Intranet applications, and using the Mainframe and AS/400 type computers for back office processing. Some companies are using AS/400s as Internet and Network servers. Most companies are opting to access their Mainframe (etc.) computers via Terminal Emulation from PC Workstations, rather than use "dumb terminals".
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