Jet printer:
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Laser printer
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Matrix printer
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Computer interface, signal read information
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Computer keyboard
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Bios, Sound signal of a bios computer
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Repeatedly pressing a computer mouse
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Read, room noise, Hard disk, write
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Franking machine
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Pressing a keypad, input error sound
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Insert the disk into the drive, read the
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Removed, The USB flash drive is inserted
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Alarm, Computer interface
★★★★★