OPTOCORE

devices, namely, digital signal processors, integrated circuits and electronic circuits for receiving, recording, transmitting and reproducing data of all types especially audio, video and measured data; data processing devices, namely, printed circuit boards and computers provided with the aforementioned electronic circuits; printed circuit boards; optical waveguides; housings for accommodating printed circuit boards; connecting plugs, connecting jacks and connecting couplings for use with optical waveguides

printing plant products, namely, books, instructional manuals, and printed teacher guides featuring information concerning the use of digital signal processors, integrated circuits, electronic circuits, printed circuit boards, computers provided with electronic circuits, optical waveguides and housings for accommodating printed circuit boards and connecting plugs, connecting jacks and connecting couplings for use with optical waveguides