Instructional and teaching apparatus and instruments, namely calculators, computers, audio and video books, namely prerecorded audiocassettes, compact discs, videocassettes and DVDs featuring musical, comedy, drama, action, adventure and animation; apparatus for the processing, recording, transmission or reproduction of sound, video and images, namely audio cassette and disc players, DVD players, video cassette and disc recorders and players, compact disc players, digital audio tape recorders...