FUNCTIONAL REQUIREMENTS :
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The system should have finger print recognition.
The system should have face unlock.
User should be able to set his password.
The user should be able to undo his error.
The user can resize the font he writes.
Screen size and brightness should be adaptive.
The system should hold multiple features, with immense diversity to users.
It should be associated with almost all the famous languages if its released
internationally.(or atleast just the universal language i.e English )