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MICRO-COMPUTER RELATED ENHANCEMENT PRODUCTS, NAMELY MULTI-FUNCTION COMPUTER EXPANSION CIRCUIT CARDS AND BOARDS; MEMORY CIRCUIT CARDS AND BOARDS, CIRCUIT CARDS AND BOARDS PERMITTING PERSONAL COMPUTERS TO COMMUNICATE WITH MINI AND/OR MAIN FRAME COMPUTERS; BLANK HARD DISKS; CIRCUIT CARDS AND BOARDS FOR GRAPHIC APPLICATIONS; TAPE BACK-UPS; CIRCUIT CARDS AND BOARDS FOR LOCAL AREA NETWORK APPLICATIONS; MODEMS; SINGLE SLOT HALF CIRCUIT CARDS; WIRE WRAP CIRCUIT CARDS; EXTENDER CIRCUIT CARDS; CONNECTOR MOUNTING BRACKETS; COMPUTER PROGRAMS AND USER INSTRUCTION MANUALS SOLD THEREWITH