Hard disk, read, write, room noise:
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Hard disk, write, room noise, read
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Interference, Modem connection, signal
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Jet printer
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Photocopy (photocopy)
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Computer simulated laser
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Computer mouse click
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Old computer keyboard
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Computer interface, alarm
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Floppy disk reading
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Computer keyboard
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Repeatedly pressing a computer mouse
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Turn on, turn off the old monitor
★★★★★