1. A communication system, comprising: a base station including: means for storing information within a plurality of information files relating to a plurality of information services, said means for storing stores access information relating to the plurality of information services wherein said access information being arranged in a hierarchy-tree-structure for providing access to the information being stored; means for receiving an information service request for requesting the information within at least one of the plurality of information files from a selective call receiver; and means for transmitting the information requested from within the at least one of the plurality of information files to the selective call receiver; and the selective call receiver including: means for generating the information service request, said means for generating generates the information service request in a code word having a series of bits for identifying the at least one of the plurality of information files, wherein the plurality of information files are, organized in a hierarchy-tree-structure and the codeword having 2.times.N series of bits capable of providing access to N levels of the plurality of information files of the hierarchy-tree structure wherein every 2 bits of the 2.times.N series of bits provides access to a different level of the hierarchy-tree-structure; means for transmitting the information service request; means for receiving the information transmitted from the base station in response to the information service request; means for storing the information being received; and means for displaying the information.