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DATA TERMINALS FOR COMMUNICATIONS, COMPUTERS AND WORD PROCESSING, INCORPORATING PRINTERS, KEYBOARDS, TEXT DISPLAY UNITS, MAGNETIC DISC DRIVES, PAPERWINDERS AND MODEMS, AND POWER SUPPLIES, AND PARTS THEREFOR; PAPER TAPE PERFORATORS AND TAPE READERS; MULTI-PORT DATA COMMUNICATION SWITCHES; RECORDED PROGRAMS FOR DATA TERMINALS AND DATA COMMUNICATION SWITCHES; AND BLANK AND/OR PRERECORDED MAGNETIC DISCS