The introduction to this catalogue by Guy Bleus deals with definitions of mail art and the network and mail-art work including: 1. The phase of coding, 2. The phase of transmission, 3. The phase of receiving and decoding, 4. The phase of feedback and response snd finally, Senders and Receivers (or the Mail-Art Network). This catalogue provides an extensive address list of the contributors. -- Source of annotation: Marvin or Ruth Sackner.

This second volume of the catalogue mainly documents the Congress held in conjunction with the exhibition. It includes a congress summary by Kornelia Roder. There are also essays by Geza Perneczky, Karol Sauerland, Piotr Rypson, Guy Schraenen, Karla Sachse, Joachim Blank, and Balint Szombathy on the political-cultural-artistic implications of Mail Art. The catalogue contains a transcription of a panel discussion on Mail Art. The participants included Ruth Wolf-Rehfeldt, Klaus Groh, Leonard Frank Duch, Joseph H. Huber, Thomas Schulz, Birger Jesch, Hans-Ruedi Fricker, and Uwe Warnke. The catalogue reprints reviews of the exhibition. Four pages of calligraphic concrete poetry, entitled "Mnemonic Scores" by Valeri Scherstjanoi begin this book. -- Source of annotation: Marvin or Ruth Sackner.

This exhibition included original rubberstampings collected on correspondence, documents and in publications. -- Source of annotation: Marvin or Ruth Sackner.