Old computer keyboard:
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Laser printer
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Manual copy machine
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Photocopy (photocopy)
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Floppy disk reading
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Input error sound, Pressing a keypad
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Computer keyboard
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Repeatedly pressing a computer mouse
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Franking machine
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Computer mouse movement
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CD / DVD drive, disc read
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Sound signal of a bios computer, bios
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Opening, closing the laptop cover
★★★★★