| http://www.w3.org/ns/prov#value | - A digital data communications system comprising:(a) a closed, one-way, bit-serial path, (b) a plurality of independent stations connected in said signal path, each station receiving digital data including an access-control token from the path and transmitting digital data including an access-control token to said path, each said station comprising:(i) a main processor containing a main CPU, a main
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