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  2. IBM hammer printers - Wikipedia

    en.wikipedia.org/wiki/IBM_hammer_printers

    The first IBM band printer, it was released in 1974. It is a 155 lpm printer with a 48 character set and uses one hammer for two print positions. It has 80 printer positions, but could be ordered with 132 print positions as a feature. It is part of the IBM 3600 banking system and is loop attached to an IBM 3601 controller.

  3. IBM System/23 Datamaster - Wikipedia

    en.wikipedia.org/wiki/IBM_System/23_Datamaster

    The System/23 Datamaster (Model 5322 desktop model [2] and Model 5324 floor model [3]) is an 8-bit microcomputer developed by IBM.Released in July 1981, [4] the Datamaster was the least expensive IBM computer until the far less expensive and far more popular IBM PC was announced in the following month.