9 COMPUTER WORKSTATIONS, COMPRISING EITHER A 286 OR 386 MICROPROCESSOR, ONE OR TWO HIGH RESOLUTION COLOR MONITORS, COMPRESSION BOARD, TAPE BACKUP SYSTEM, HARD DISK, MATH COPROCESSOR, SCANNER INTERFACE, AT LEAST 9 MEGABYTES OF RANDOM ACCESS MEMORY, SERIAL-PARALLEL INTERFACES AND COMPUTER PROGRAMS, FOR OPTICALLY SCANNING ARCHITECTURAL AND ENGINEERING DESIGNS AND DRAWINGS, FACILITIES PLANS, MAPS AND TEXTS INTO COMPUTER FILE FORMATS, WITH OR WITHOUT OPTICAL DIGITAL SCANNERS