Scratch your brain

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Across
  1. 2. This operating system is used for mobile devices by Google
  2. 3. Docs Free online word processing program similar to M S Word
  3. 5. This area contains the actual chart and its other components.
  4. 6. This is the another name of Base
Down
  1. 1. CEO of Alphabet incorporation
  2. 4. Inventor of Modern day Number System