9 Apparatus for recording of sound and images, namely, audio and video tape recorders, audio and video cassette recorders, audio and video CD and DVD recorders, storage media, namely hard disks, DATs, optical disks, DVDs, AIT tapes, flexible multitask, multiple user modular recorders, and parts therefor; apparatus for transmission or reproduction of sound and images, namely, play-back recorders, computer operated play-back recorders, local loudspeakers, head phones, PABX phones, a multimedia computer which can be operated via a LAN, a trader's turret and a telephone; recording apparatus and telephones for dealing rooms, magnetic data carrier supports, namely, tapes and disks; data processing equipment, namely, computer hardware and software for stock market and financial voice transactions; and computers