Abstract: A holder for a rectangular cassette such as a magnetic-tape cassette comprises two parallel main walls and, three interconnecting transverse walls, and one short open side through which a cassette can be inserted into or removed from a cassette-receiving space defined by said walls. One of the main walls of the holder has a window which exposes a cassette main wall, provided with a label. The window of the holder is at least partly open, thereby enabling the cassette, when the holder is held in the palm of one hand, to be pushed out at least partly with a thumb, from which position the cassette can be loaded into a player/recorder by a loading mechanism.

Abstract: A system for recording and/or reading signals on/from information carriers (4) accommodated in cassettes (2) composed of cassettes (2-3A) of a first type and cassettes (2-3B) of a second type, which two types of cassettes have substantially identical dimensions and shapes apart from local identifying distinctive features (22-3A, 26-3A; 22-3B, 26-3B) of a first type and of a second type respectively. Drive apparatus constructed to cooperate with a cassette of the system when inserted in a correct orientation. Drive apparatus of the first type, is constructed for cooperation with cassettes (2-3A) of the first type but not for cooperation with cassettes (2-3B) of the second type, and drive apparatus of a second type, is constructed for cooperation with cassettes (2 3B) of the second type but not for cooperation with cassettes (2 3A) of the first type.