In accordance with an embodiment of the invention, a method for creating a self-authenticating document is disclosed. Packets of data are transmitted over a network between an ingress node of the source workstation and an egress node of the destination workstation. Local content commercials may be inserted into the overall data stream, or into one of a plurality of program signals comprising the data stream. If the received data type is compressed data, the process may include the additional functions of determining a compression ratio thereof, and accepting the compressed data for use as, or decompressing and recompressing the data, based on acceptability of said compression ration determination. A third embodiment includes a plurality of moveable blocks adjustably mounted on an elongated rack, with adjacent blocks defining a notch between them for reception of a segment of a loop of a coilable item.