Turning on the computer, fan noise, shutting down:
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Room noise, Hard disk, write, read
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Turn on, turn off the old computer
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Computer keyboard
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Alarm, Computer interface
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Typewriter, Office work, environmental sounds
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Pressing a keypad, input error sound
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The USB flash drive is inserted, removed
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General noise, Office work
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Floppy disk reading
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Computer simulated laser
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Turn on, turn off the old monitor
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Jet printer
★★★★★