IBM 3270
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The IBM 3270 is a family of block oriented display and printer computer terminals introduced by IBM in 1971 and normally used to communicate with IBM mainframes. The 3270 was the successor to the IBM
IBM 3277 Model 2
Sample IBM 3270 cluster with one control unit connected to a printer and two displays
IBM selector-pen in use
3278 terminal
3270 emulator
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A 3270 Emulator is a terminal emulator that duplicates the functions of an IBM 3270 mainframe computer terminal on a computer, usually a PC or similar microcomputer.
DCA IRMA II ISA for PCs.