| 摘要 |
A multichannel switched communication system having a plurality of communication channels, with a plurality of information records stored in a database relating to a plurality of identified objects; a database server system for selectively accessing information records based on a selection criteria; a common input, receiving the selection criteria associated with an identification of a receiver, the selection criteria including object identification information; and a multichannel distribution system capable of simultaneously transmitting a plurality of information records, for transmitting the selectively accessed information record to the identified receiver. A plurality of mobile receivers each receives a desired broadcast on one of a plurality of channels. A bar code scanner associated with a mobile receiver identifies desired information record for retrieval. An infrared or radio frequency communication system may be provided for transmitting control data from the mobile receiver.
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