Office work, general noise:
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Opens, closes the CD / DVD tray
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Fan noise, Turning on the computer, shutting
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Bios, Sound signal of a bios computer
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Laser printer
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Franking machine
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Jet printer
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Repeatedly pressing a computer mouse
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Insert the disk into the drive, read the
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Photocopy (photocopy)
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Computer interface, signal read information
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Write, read, room noise, Hard disk
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Computer simulated laser
★★★★★