Question

how many task computer does for us​

Answer 1

Answer:

At a fundamental level, computers operate through these four functions: input, output, processing, and storage. Input: the transfer of information into the system (e.g., through a keyboard). Output: the presentation of information to the user (e.g., on a screen).

Answer 2

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Computers can only do one task (or process) at a time. But a computer can change tasks very rapidly, and fool slow human beings into thinking it's doing several things at once. This is called timesharing.

Hope it helps you :D