Data processing apparatus, namely, data processors; computer memories; computer peripheral devices; electronic notice boards; photographic, electrostatic, and thermic photocopiers; audio players, namely, audio cassette players; video players, namely, video disk players; telephone apparatus; cameras for photography; galvanic cells, namely, batteries; personal stereos; measuring instruments, namely, instruments for measuring length; microscopes; fluorescent screens; pince-nez; video disks and t...