Operating system

Operating system

1. Unix

   • Linux
     • Ubuntu

2. Google

   • Android
     • Alpha
     • Beta
     • Cupcake
     • Donut
     • Eclair
     • Froyo
     • Gingerbread
     • Honeycomb
     • Ice cream Sandwich
     • Jelly Bean
     • KitKat
     • Lollipop
     • MarshMallow
     • Oreo
     • Nougat
   • Chrome Os
   • Chrome OS
   • Chrome os

3. Apple

   • Ios
   • MacOs
   • MacOs
   • MacOs

4. Microsoft

   • Windows
     • windows vista

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