The micro ribbon or miniature ribbon connector is a common type of electrical connector for a variety of applications, such as computer and telecommunications equipment that have many contacts. The contacts are not pins, but small flat bands of metal, called ribbon contacts.
There are versions of 24, 36 and 50 contacts.
And different names to this type of connector, as many as manufacturers: telco, 25-pair, miniature delta ribbon, mini D ribbon, delta ribbon, MDR, Amphenol, and above all it is known as Centronics connector because Centronics introduced it for use with the parallel port of printers, and it is standardized as IEEE 1284 type B. Therefore, other connectors of this size are also called Centronics connectors.
Currently it has little use