Turning on the laptop, fan noise, shutting down:
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Room noise, read, write, Hard disk
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Franking machine
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Typewriter, Office work, environmental sounds
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Pressing a keypad, input error sound
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Closes the CD / DVD tray, Opens
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Turn off the hard drive, Turn on
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Fan noise, shutting, Turning on the computer
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Repeatedly pressing a computer mouse
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Double click computer mouse
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Computer interface, alarm
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Bios, Sound signal of a bios computer
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Computer simulated laser
★★★★★