Office work, typewriter, environmental sounds:
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Shutting, fan noise, Turning on the computer
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Repeatedly pressing a computer mouse
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General noise, Office work
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Manual copy machine
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Laser printer
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Bios, Sound signal of a bios computer
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Alarm, Computer interface
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Floppy disk reading
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Turn off the old computer, Turn on
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Write, Hard disk, room noise, read
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Signal read information, Computer interface
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Modem connection, signal, interference
★★★★★