9 electrical, optical, weighing, measuring, signaling and control devices and instruments for operating, controlling and regulating franking systems exclusively for office use; namely, scanners, weight scales, letter scales, liquid crystal displays and CRT monitors, and envelop format detecting machines; barcode readers; data processing equipment, namely, data processors, computer memories and encoders for PC based franking machines, and computers; data input and output devices, namely, devices for sending, receiving, identifying, processing and storing of postal data; namely, data processors, blank harddrives, memory chips, and modems; calculators; computer software for operating and updating postal franking machines including the ability for the postal franking machine to access and communicate over the Internet; encoded smart cards containing programming for operating a postal franking machine, for authenticating users, and for granting authority for communicating with a franking machine; interface boards for computer keyboard; computer security devices; namely, security cards for encrypting and authenticating communications between a franking machine and a host computer, security modules for monitoring internal memories, and security clock modules for maintaining the integrity of internal clocks; letter and package scales; electrically and electronically controlled machines for sending receiving, identifying, processing, and saving of postage due; and parts and accessories therefore