Old computer keyboard:
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Laser printer
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Signal read information, Computer interface
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Office work, typewriter, environmental sounds
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Old computer keyboard
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Double click computer mouse
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Matrix printer
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Turn on, turn off the old computer
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Manual copy machine
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Photocopy (photocopy)
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Turn on, turn off the old monitor
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Computer mouse movement
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Input error sound, Pressing a keypad
★★★★★