1. Apparatus for receiving an encoded data stream comprising a plurality of data groups as transmitted from a remote location and for selectively accessing the received data stream to sort out and store only those data groups of interest, each data group of the encoded data stream includes its unique identifying word, the encoded data stream includes a classifier manifestation indicative of a protected data group, said apparatus comprising: (a) decoder means for receiving and decoding the transmitted, encoded data stream; (b) temporary storage means coupled to said decoder means for sequentially receiving and temporarily storing, one at a time, at least said identifying word of each received and decoded data group of the data stream; (c) updateable, addressable memory means for storing a plurality of those data groups of interest and their identifying words at corresponding, addressable locations therein; and (d) control means comprising comparing means coupled to said temporary storage means and said updateable, addressable memory means for accessing the identifying word currently stored in said temporary storage means and each of said identifying words of the data groups of interest and for comparing the temporarily stored, current identifying word with each of the identifying words of the data groups of interest, updating means responsive to said comparing means and operative in a first mode, between the currently stored identifying word and one of the identifying words of the data groups of interest for effecting the storage of the data group corresponding to the currently stored identifying word in that location of said updateable, addressable memory means in place of the previously stored group of interest corresponding to the one matched identifying word, and in a second mode if a match is not made between the groups of interest to discard from said temporary storage means the received and decoded data group, and classifier means settable with a classifier manifestation means for effecting a comparison of the transmitted classifier manifestation of the data stream and the set classifier manifestation and, if a comparison is made therebetween, for accessing and transfering the protected data group to said temporary storage means and, if a comparison is not made therebetween, for discarding the protected data group.