Old computer keyboard:
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Franking machine
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Input error sound, Pressing a keypad
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Repeatedly pressing a computer mouse
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Turn off the old computer, Turn on
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Photocopy (photocopy)
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Computer mouse click
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Signal, Modem connection, interference
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Floppy disk reading
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Turn off the old monitor, Turn on
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Sound signal of a bios computer, bios
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Signals, Computer interface
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Manual copy machine
★★★★★