Explanation:
don't search butter lettuce it's a veggie so you say butter lettuce vegetable
When does this have to be done?
Answer:
No, think about mass surveillance in China (and in USA!), and the "social credit" system.
Windows OS and Mac OS are examples of single user, multi tasking Operating Systems.
You could use the ADM website from a computer or any other device (that is not missing)
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