Computer interface, alarm:
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Turning on the computer, fan noise, shutting
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Sound signal of a bios computer, bios
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General noise, Office work
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Floppy disk reading
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Turn on, turn off the hard drive
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Turn off the old computer, Turn on
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Signal, interference, Modem connection
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Double click computer mouse
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Hard disk, read, room noise, write
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Computer simulated laser
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Computer mouse movement
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Removed, The USB flash drive is inserted
★★★★★