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Free and open, or paid?

Exercise and reference answers

Items
  1. Item
    Ubuntu
    Answer
    left
  2. Item
    Python
    Answer
    left
  3. Item
    LibreOffice
    Answer
    left
  4. Item
    Mozilla Firefox
    Answer
    left
  5. Item
    Microsoft Windows
    Answer
    right
  6. Item
    Tally
    Answer
    right
  7. Item
    Quickheal
    Answer
    right
Categories
Left
Open source
Right
Proprietary
Instructions
Swipe left for free and open source, right for proprietary.

Explanation

_Source: syllabus CS XI Ch1 Computer System, 1.7.5 Proprietary or Free and Open Source Software_
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