7plus: 7PLUS is an encoder vaguely similar to Unix's UUENCODE.
7plus: It uses a very effective radix216 encoding and incorporates
7plus: diverse mechanisms to ensure decoded data is not corrupted.
7plus: It also includes an interactive repair mechanism which allows
7plus: the repair of damaged files using correction files, thus 
7plus: eliminating the need to retransmit entire files. In case of
7plus: a corruption, only the faulty sections are resent. 7PLUS
7plus: is only meant to be used within the Packet Radio network
7plus: for the tranport of binary data through Packet Radio mail.
7plus: It cannot be used for Internet eMail since it needs a
7plus: (almost) transparent path from end to end.
