DCA

ELECTRONIC EQUIPMENT FOR CARRYING OUT MONITORING, SYSTEM DIAGNOSTIC AND SYSTEM RECONFIGURATION FUNCTIONS; ELECTRONIC CIRCUITS FOR TRANSMITTING AND SWITCHING BINARY SYNCHRONOUS DATA; PROTOCOL CONVERTERS AND CONTROLLERS FOR ALLOWING ASYNCHRONOUS TERMINALS TO COMMUNICATE WITH BINARY SYNCHRONOUS DATA LINK CONTROL HOSTS; CIRCUIT BOARDS FOR ENABLING DATA COMMUNICATION BETWEEN PERSONAL COMPUTERS AND LOCAL OR REMOTE MAINFRAME COMPUTERS; CIRCUIT BOARDS FOR ENABLING COMMUNICATION BETWEEN PERSONAL COMPUTERS; CIRCUIT BOARDS FOR ALLOWING COMPUTER PRINTERS TO EMULATE OTHER PRINTERS; CIRCUIT BOARDS FOR ALLOWING PERSONAL COMPUTERS TO EMULATE MAINFRAME COMMUNICATIONS EQUIPMENT; COMPUTER KEYBOARDS; COMPUTER PROGRAMS RECORDED ON MAGNETIC DISKS FOR FILE TRANSFER FUNCTIONS WITH CENTRALIZED CONTROL OF DATA SECURITY; TIME DIVISION MULTIPLEXERS FOR HIGH SPEED VOICE AND DATA TRANSMISSION, WITH INTERNAL MODEMS; AND HIGH SPEED DATA COMMUNICATION SWITCHES