First generation computer

  1. First generation computer

First generation computer used vacuum tube. These were large in size and writing programmes on them was difficult.


  • Technology vacuum tube
  • Supported machine language only
  • Large space needed to store
  • Very costly
  • Ac needed to cool down
  • Consumed lot of electricity
  • slow input and output device
  • Non portable
  • constant maintenance required
  • calculate data in millisecond

Examples: ENIAC, EDVAC, IBM-701, IBM-650

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