The first phonographic disc was introduced by the Berliner Gramophon company in 1894 and turned at about 70 rpm. In the beginning of the 50s, shellac was replaced by PVC (from here the name vinyl), with less rotation speed which offered more space for taping. The LP record had a shallower groove, compared with the 78rpm, enough to get the name "microgroove". The 45rpm was almost always a single being destined - at least initially - for the juke-box. With the advent of the cassette player - already in place since the 50s but appreciated by the public in the 70s and 80s - cassette tapes became the perfect medium to listen to music while moving around or to put together personal playlists. Used in cars, in ever smaller portable players, in stereo players more or less sophisticated also as mini-cassettes, perfect to tape lessons or notes.