| http://www.w3.org/ns/prov#value | - The components of the control block are a CPU 32 for controlling a communication operation, a memory unit (RAM) 34 for storing data and other information transmitted to and received from the central station 3 and other communication parties, a modulator-demodulator (MODEM) 36 for transmitting and receiving digital signals for picture display, a network control unit (NCU) 38 used for connection wit
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