Second generation computer

  1. Second generation computer

Second generation computers used transistor instead of vacuum tube. Thus, the size of computer got reduced considerably. In this generation, the concept of CPU, memory programming languages (COBOL, FORTRAN) and input/output units were developed.

  • Technology transistor
  • Magnetic core used in primary memory
  • Magnetic tape and magnetic disks as secondary storage device
  • assembly language
  • still very costly
  • Still ac needed to cool down
  • Size become smaller in comparison to first generation
  • punch card used as input device
  • more reliable comparison to first generation

Examples: IBM 1620, IBM 7094, CDC 1604, UNIVAC

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