IBM 2030
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The IBM 2030, also called IBM System/360 model 30, was a popular IBM mainframe of the 1960s. It was one of the slowest models from IBM's System/360 line. Its CPU used an 8-bit microarchitecture with only a few hardware registers; everything that the programmer saw was emulated by the microprogram.
Usually, this machine was running the DOS/360 operating system.

